Zoo
Encyclopedia
A zoological garden, zoological park, menagerie, or zoo is a facility in which animals are confined within enclosures, displayed to the public, and in which they may also be bred.

The term zoological garden refers to zoology
Zoology
Zoology |zoölogy]]), is the branch of biology that relates to the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct...

, the study of animals, a term deriving from the Greek
Greek language
Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...

 zōon (ζῷον, "animal") and lógos (λóγος, "study"). The abbreviation "zoo" was first used of the London Zoological Gardens, which opened for scientific study in 1828 and to the public in 1847. The number of major animal collections open to the public around the world now exceeds 1,000, around 80 percent of them in cities.

Keeping animals in zoos raises concerns for animals rights.

Etymology

London Zoo
London Zoo
London Zoo is the world's oldest scientific zoo. It was opened in London on 27 April 1828, and was originally intended to be used as a collection for scientific study. It was eventually opened to the public in 1847...

, which opened in 1828, first called itself a menagerie or "zoological garden," which is short for "Gardens and Menagerie of the Zoological Society of London." The abbreviation "zoo" first appeared in print in the UK around 1847, when it was used for the Clifton Zoo
Bristol Zoo
Bristol Zoo is a zoo in the city of Bristol in South West England. The zoo's stated mission is "Bristol Zoo Gardens maintains and defends biodiversity through breeding endangered species, conserving threatened species and habitats and promoting a wider understanding of the natural...

, but it was not until some twenty years later that the shortened form became popular in the song "Walking in the Zoo on Sunday" by music-hall artist Alfred Vance
Alfred Vance
Alfred Peek Stevens , best known by his stage name Alfred Vance, was an English singer in the 19th Century music halls.-Early life and family:Vance was born in London in 1839...

. The term "zoological park" was used for more expansive facilities in Washington, D.C.
Washington, D.C.
Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....

, and the Bronx in New York, which opened in 1891 and 1899 respectively.

Relatively new terms for zoos coined in the late 20th century are "conservation park" or "biopark". Adopting a new name is a strategy used by some zoo professionals to distance their institutions from the stereotypical and nowadays criticized zoo concept of the 19th century. The term "biopark" was first coined and developed by the National Zoo
Smithsonian National Zoological Park
The Smithsonian National Zoological Park, commonly known as the National Zoo, is one of the oldest zoos in the United States, and as part of the Smithsonian Institution, does not charge admission. Founded in 1889, its mission is to provide leadership in animal care, science, education,...

, Washington, D.C. in the late 1980s. In 1993, the New York Zoological Society changed its name to the Wildlife Conservation Society
Wildlife Conservation Society
The Wildlife Conservation Society based at the Bronx Zoo was founded in 1895 as the New York Zoological Society and currently manages some of wild places around the world, with over 500 field conservation projects in 60 countries, and 200 scientists on staff...

 and rebranded the zoos under its jurisdiction as "wildlife conservation parks."

Ancient world

The predecessor of the zoological garden is the menagerie
Menagerie
A menagerie is/was a form of keeping common and exotic animals in captivity that preceded the modern zoological garden. The term was first used in seventeenth century France in reference to the management of household or domestic stock. Later, it came to be used primarily in reference to...

, which has a long history from the ancient world to modern times. The oldest known zoological collection was revealed during excavations at Hierakonpolis, Egypt
Egypt
Egypt , officially the Arab Republic of Egypt, Arabic: , is a country mainly in North Africa, with the Sinai Peninsula forming a land bridge in Southwest Asia. Egypt is thus a transcontinental country, and a major power in Africa, the Mediterranean Basin, the Middle East and the Muslim world...

 in 2009, of a ca. 3500 B.C. menagerie. The exotic animals included hippo
Hippo
A hippo or hippopotamus is either of two species of large African mammal which live mainly in and near water:* Hippopotamus* Pygmy HippopotamusHippo may also refer to:-Given names:...

s, hartebeest
Hartebeest
The hartebeest is a grassland antelope found in West Africa, East Africa and Southern Africa. It is one of the three species classified in the genus Alcelaphus....

, elephant
Elephant
Elephants are large land mammals in two extant genera of the family Elephantidae: Elephas and Loxodonta, with the third genus Mammuthus extinct...

s, baboon
Baboon
Baboons are African and Arabian Old World monkeys belonging to the genus Papio, part of the subfamily Cercopithecinae. There are five species, which are some of the largest non-hominoid members of the primate order; only the mandrill and the drill are larger...

s and wildcats. In the 2nd century BCE, the Chinese Empress
Emperor of China
The Emperor of China refers to any sovereign of Imperial China reigning between the founding of Qin Dynasty of China, united by the King of Qin in 221 BCE, and the fall of Yuan Shikai's Empire of China in 1916. When referred to as the Son of Heaven , a title that predates the Qin unification, the...

 Tanki had a "house of deer" built, and King Wen of Zhou
King Wen of Zhou
King Wen of Zhou family name : Ji , Clan name : Zhou Personal name: Chang, known as Zhou Chang or Xibo Chang was the founder of the Zhou Dynasty and the first epic hero of Chinese history....

 kept a 1500 acres (6.1 km²) zoo called Ling-Yu, or the Garden of Intelligence. Other well-known collectors of animals included King Solomon of the Kingdom of Israel and Judah
United Monarchy
According to Biblical tradition, the united Kingdom of Israel was a kingdom that existed in the Land of Israel, a period referred to by scholars as the United Monarchy. Biblical historians date the kingdom from c. 1020 BCE to c...

, Kings Semirami and Ashurbanipal
Ashurbanipal
Ashurbanipal |Ashur]] is creator of an heir"; 685 BC – c. 627 BC), also spelled Assurbanipal or Ashshurbanipal, was an Assyrian king, the son of Esarhaddon and the last great king of the Neo-Assyrian Empire...

 of Assyria
Assyria
Assyria was a Semitic Akkadian kingdom, extant as a nation state from the mid–23rd century BC to 608 BC centred on the Upper Tigris river, in northern Mesopotamia , that came to rule regional empires a number of times through history. It was named for its original capital, the ancient city of Assur...

, and King Nebuchadnezzar
Nebuchadrezzar II
Nebuchadnezzar II was king of the Neo-Babylonian Empire, who reigned c. 605 BC – 562 BC. According to the Bible, he conquered Judah and Jerusalem, and sent the Jews into exile. He is credited with the construction of the Hanging Gardens of Babylon and also known for the destruction...

 of Babylonia
Babylonia
Babylonia was an ancient cultural region in central-southern Mesopotamia , with Babylon as its capital. Babylonia emerged as a major power when Hammurabi Babylonia was an ancient cultural region in central-southern Mesopotamia (present-day Iraq), with Babylon as its capital. Babylonia emerged as...

. By the 4th century BCE, zoos existed in most of the Greek city states; Alexander the Great is known to have sent animals that he found on his military expeditions back to Greece. The Roman emperors kept private collections of animals for study or for use in the arena, the latter faring notoriously poorly. The 19th-century historian W.E.H. Lecky
William Edward Hartpole Lecky
William Edward Hartpole Lecky, OM was an Irish historian.-Early life:Born at Newtown Park, near Dublin, he was the eldest son of John Hartpole Lecky, a landowner....

 wrote of the Roman games
Ludi Romani
The Ludi Romani were a religious festival in ancient Rome. They were held annually starting in 366 BC from September 12 to September 14, later extended to September 5 to September 19. In the last 1st century BC, an extra day was added in honor of the deified Julius Caesar on 4 September...

, first held in 366 BCE:

Medieval England

Henry I of England
Henry I of England
Henry I was the fourth son of William I of England. He succeeded his elder brother William II as King of England in 1100 and defeated his eldest brother, Robert Curthose, to become Duke of Normandy in 1106...

 kept a collection of animals at his palace in Woodstock
Woodstock, Oxfordshire
Woodstock is a small town northwest of Oxford in Oxfordshire, England. It is the location of Blenheim Palace, a UNESCO World Heritage Site.Winston Churchill was born in Blenheim Palace in 1874 and is buried in the nearby village of Bladon....

, which reportedly included lions, leopards, and camels. The most prominent collection in medieval England was in the Tower of London
Tower of London
Her Majesty's Royal Palace and Fortress, more commonly known as the Tower of London, is a historic castle on the north bank of the River Thames in central London, England. It lies within the London Borough of Tower Hamlets, separated from the eastern edge of the City of London by the open space...

, created as early as 1204 by King John I. Henry III
Henry III of England
Henry III was the son and successor of John as King of England, reigning for 56 years from 1216 until his death. His contemporaries knew him as Henry of Winchester. He was the first child king in England since the reign of Æthelred the Unready...

 received a wedding gift in 1235 of three leopards from Frederick II, Holy Roman Emperor
Frederick II, Holy Roman Emperor
Frederick II , was one of the most powerful Holy Roman Emperors of the Middle Ages and head of the House of Hohenstaufen. His political and cultural ambitions, based in Sicily and stretching through Italy to Germany, and even to Jerusalem, were enormous...

, and in 1264, the animals were moved to the Bulwark, renamed the Lion Tower, near the main western entrance of the Tower. It was opened to the public during the reign of Elizabeth I
Elizabeth I of England
Elizabeth I was queen regnant of England and Ireland from 17 November 1558 until her death. Sometimes called The Virgin Queen, Gloriana, or Good Queen Bess, Elizabeth was the fifth and last monarch of the Tudor dynasty...

 in the 16th century. During the 18th century, the price of admission was three half-pence, or the supply of a cat or dog for feeding to the lions. The animals were moved to the London Zoo when it opened.

Modern era

The oldest existing zoo, the Vienna Zoo
Tiergarten Schönbrunn
Tiergarten Schönbrunn or Vienna Zoo is a zoo located on the grounds of the famous Schönbrunn Palace in Vienna, Austria...

 in Austria, evolved from the Imperial Menagerie at the Schönbrunn Palace
Schönbrunn Palace
Schönbrunn Palace is a former imperial 1,441-room Rococo summer residence in Vienna, Austria. One of the most important cultural monuments in the country, since the 1960s it has been one of the major tourist attractions in Vienna...

 in Vienna, an aristocratic menagerie founded in 1752 by the Habsburg
Habsburg
The House of Habsburg , also found as Hapsburg, and also known as House of Austria is one of the most important royal houses of Europe and is best known for being an origin of all of the formally elected Holy Roman Emperors between 1438 and 1740, as well as rulers of the Austrian Empire and...

 monarchy, which was opened to the public in 1765. In 1775, a zoo was founded in Madrid, and in 1795, the zoo inside the Jardin des Plantes
Jardin des Plantes
The Jardin des Plantes is the main botanical garden in France. It is one of seven departments of the Muséum national d'histoire naturelle. It is situated in the 5ème arrondissement, Paris, on the left bank of the river Seine and covers 28 hectares .- Garden plan :The grounds of the Jardin des...

in Paris was founded by Jacques-Henri Bernardin
Jacques-Henri Bernardin de Saint-Pierre
Jacques-Henri Bernardin de Saint-Pierre was a French writer and botanist...

, with animals from the royal menagerie at Versailles, primarily for scientific research and education. The Kazan Zoo, the first zoo in Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

 was founded in 1806 by the Professor of Kazan State University Karl Fuchs. The Zoological Society of London
Zoological Society of London
The Zoological Society of London is a charity devoted to the worldwide conservation of animals and their habitats...

, founded in 1826 by Stamford Raffles
Stamford Raffles
Sir Thomas Stamford Bingley Raffles, FRS was a British statesman, best known for his founding of the city of Singapore . He is often described as the "Father of Singapore"...

, adopted the idea of the Paris zoo when they established the London Zoo
London Zoo
London Zoo is the world's oldest scientific zoo. It was opened in London on 27 April 1828, and was originally intended to be used as a collection for scientific study. It was eventually opened to the public in 1847...

 in Regent's Park
Regent's Park
Regent's Park is one of the Royal Parks of London. It is in the north-western part of central London, partly in the City of Westminster and partly in the London Borough of Camden...

 in 1828, which opened to paying visitors in 1847.Dublin Zoo
Dublin Zoo
Dublin Zoo , in Phoenix Park, Dublin, Ireland is the largest zoo in Ireland and one of Dublin's most popular attractions. Opened in 1831, the zoo describes its role as conservation, study, and education...

 was opened in 1831 by members of the medical profession interested in studying animals while they were alive and more particularly getting hold of them when they were dead. The first zoological garden in Australia was Melbourne Zoo
Melbourne Zoo
The Royal Melbourne Zoological Gardens, commonly known as the Melbourne Zoo, contains more than 320 animal species from Australia and around the world. The zoo is north of the centre of Melbourne. It is accessible via Royal Park station on the Upfield railway line, and is also accessible via tram...

 in 1860. In the same year, Central Park Zoo
Central Park Zoo
The Central Park Zoo is a small zoo located in Central Park in New York City. It is part of an integrated system of four zoos and the New York Aquarium managed by the Wildlife Conservation Society , and is accredited by the Association of Zoos and Aquariums .The zoo began in the 1860s as a...

, the first public zoo in the United States, opened in New York, although in 1859, the Philadelphia Zoological Society
Philadelphia Zoo
The Philadelphia Zoo, located in Philadelphia, Pennsylvania, on the west bank of the Schuylkill River, was the first zoo in the United States. Chartered by the Commonwealth of Pennsylvania on March 21, 1859, its opening was delayed by the American Civil War until July 1, 1874...

 had made an effort to establish a zoo, but delayed opening it until 1874 because of the American Civil War
American Civil War
The American Civil War was a civil war fought in the United States of America. In response to the election of Abraham Lincoln as President of the United States, 11 southern slave states declared their secession from the United States and formed the Confederate States of America ; the other 25...

.
Zoo in Thiruvananthapuram, Kerala, India is one of the oldest in the country, and was established as an adjunct to the Museum in 1857 by the erstwhile Maharaja of Travancore in order to attract more visitors.

In 1907, the German
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 entrepreneur Carl Hagenbeck
Carl Hagenbeck
Carl Hagenbeck was a merchant of wild animals who supplied many European zoos, as well as P.T. Barnum. He is often considered the father of the modern zoo because he introduced "natural" animal enclosures that included recreations of animals' native habitats without bars...

 founded the Tierpark Hagenbeck
Tierpark Hagenbeck
The Tierpark Hagenbeck is a zoo in Stellingen, now a quarter in Hamburg, Germany. The collection began in 1863 with animals that belonged to Carl Hagenbeck Sr. , a fishmonger who became an amateur animal collector. The park itself was founded by Carl Hagenbeck Jr. in 1907...

 in Stellingen, now a quarter of Hamburg
Hamburg
-History:The first historic name for the city was, according to Claudius Ptolemy's reports, Treva.But the city takes its modern name, Hamburg, from the first permanent building on the site, a castle whose construction was ordered by the Emperor Charlemagne in AD 808...

. It is known for being the first zoo to use open enclosures surrounded by moats, rather than barred cages, to better approximate animals' natural environments.

When ecology
Ecology
Ecology is the scientific study of the relations that living organisms have with respect to each other and their natural environment. Variables of interest to ecologists include the composition, distribution, amount , number, and changing states of organisms within and among ecosystems...

 emerged as a matter of public interest in the 1970s, a few zoos began to consider making conservation their central role, with Gerald Durrell
Gerald Durrell
Gerald "Gerry" Malcolm Durrell, OBE was a naturalist, zookeeper, conservationist, author and television presenter...

 of the Jersey Zoo
Jersey Zoological Park
Jersey Zoological Park or Jersey Zoo is a zoological park established in 1959 on the island of Jersey in the English Channel by naturalist and author Gerald Durrell . It is now officially called Durrell Wildlife Conservation Trust after its founder, or Durrell for short...

, George Rabb of Brookfield Zoo
Brookfield Zoo
The Brookfield Zoo is zoo located in the Chicago suburb of Brookfield, Illinois. The zoo covers an area of and houses around 450 species of animals....

, and William Conway of the Bronx Zoo
Bronx Zoo
The Bronx Zoo is located in the Bronx borough of New York City, within Bronx Park. It is the largest metropolitan zoo in the United States, comprising of park lands and naturalistic habitats, through which the Bronx River flows....

 (Wildlife Conservation Society
Wildlife Conservation Society
The Wildlife Conservation Society based at the Bronx Zoo was founded in 1895 as the New York Zoological Society and currently manages some of wild places around the world, with over 500 field conservation projects in 60 countries, and 200 scientists on staff...

) leading the discussion. From then on, zoo professionals became increasingly aware of the need to engage themselves in conservation programs, and the American Zoo Association
Association of Zoos and Aquariums
The Association of Zoos and Aquariums was founded in 1924 and is a nonprofit organization dedicated to the advancement of zoos and public aquariums in the areas of conservation, education, science, and recreation.The AZA headquarters is located in Silver...

 soon said that conservation was its highest priority. Because they wanted to stress conservation issues, many large zoos stopped the practice of having animals perform tricks for visitors. The Detroit Zoo
Detroit Zoo
The Detroit Zoological Park, commonly known as the Detroit Zoo, is located about north of the Detroit city limits at the intersection of Woodward Avenue, 10 Mile Road, and Interstate 696 in Royal Oak and Huntington Woods, Michigan, USA...

, for example, stopped its elephant show in 1969, and its chimpanzee show in 1983, acknowledging that the trainers had probably abused the animals to get them to perform.

Human exhibits

Human beings were sometimes displayed in cages along with non-human animals, supposedly to illustrate the differences between people of European and non-European origin. In September 1906, William Hornaday, director of the Bronx Zoo
Bronx Zoo
The Bronx Zoo is located in the Bronx borough of New York City, within Bronx Park. It is the largest metropolitan zoo in the United States, comprising of park lands and naturalistic habitats, through which the Bronx River flows....

 in New York—with the agreement of Madison Grant
Madison Grant
Madison Grant was an American lawyer, historian and physical anthropologist, known primarily for his work as a eugenicist and conservationist...

, head of the New York Zoological Society—had Ota Benga
Ota Benga
Ota Benga was a Congolese Mbuti pygmy known for being featured in a controversial human zoo exhibit at New York City's Bronx Zoo in 1906. Benga came to the United States through the action of businessman and missionary Samuel Phillips Verner...

, a Congolese pygmy
Pygmy
Pygmy is a term used for various ethnic groups worldwide whose average height is unusually short; anthropologists define pygmy as any group whose adult men grow to less than 150 cm in average height. A member of a slightly taller group is termed "pygmoid." The best known pygmies are the Aka,...

, displayed in a cage with the chimpanzees, then with an orangutan
Orangutan
Orangutans are the only exclusively Asian genus of extant great ape. The largest living arboreal animals, they have proportionally longer arms than the other, more terrestrial, great apes. They are among the most intelligent primates and use a variety of sophisticated tools, also making sleeping...

 named Dohong, and a parrot. The exhibit was intended as an example of the "missing link" between the orangutan and white man. It triggered protests from the city's clergymen, but the public reportedly flocked to see it.

Human beings were also displayed in cages during the 1931 Paris Colonial Exposition
Paris Colonial Exposition
The Paris Colonial Exhibition was a six-month colonial exhibition held in Paris, France in 1931 that attempted to display the diverse cultures and immense resources of France's colonial possessions.-History :The exposition opened on 6 May 1931 in the Bois de Vincennes on the eastern outskirts of...

, and as late as 1958 in a "Congolese village" display at Expo '58
Expo '58
Expo 58, also known as the Brussels World’s Fair, Brusselse Wereldtentoonstelling or Exposition Universelle et Internationale de Bruxelles, was held from 17 April to 19 October 1958...

 in Brussels.

Appearance and type

Zoo animals usually live in enclosures that attempt to replicate their natural habitat
Habitat (ecology)
A habitat is an ecological or environmental area that is inhabited by a particular species of animal, plant or other type of organism...

s, for the benefit of the animals and the visitors. They may have special buildings for nocturnal animals, with dim white or red lighting used during the day, so the animals will be active when visitors are there, and brighter lights at night to help them sleep. Special climate conditions are created for animals living in radical environments, such as penguins. Special enclosures for bird
Bird
Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...

s, insect
Insect
Insects are a class of living creatures within the arthropods that have a chitinous exoskeleton, a three-part body , three pairs of jointed legs, compound eyes, and two antennae...

s, reptile
Reptile
Reptiles are members of a class of air-breathing, ectothermic vertebrates which are characterized by laying shelled eggs , and having skin covered in scales and/or scutes. They are tetrapods, either having four limbs or being descended from four-limbed ancestors...

s, fish
Fish
Fish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups...

, and other aquatic life forms have also been developed. Some zoos have walk-through exhibits where visitors enter enclosures of non-aggressive species, such as lemur
Lemur
Lemurs are a clade of strepsirrhine primates endemic to the island of Madagascar. They are named after the lemures of Roman mythology due to the ghostly vocalizations, reflective eyes, and the nocturnal habits of some species...

s, marmoset
Marmoset
Marmosets are the 22 New World monkey species of the genera Callithrix, Cebuella, Callibella, and Mico. All four genera are part of the biological family Callitrichidae. The term marmoset is also used in reference to the Goeldi's Monkey, Callimico goeldii, which is closely related.Most marmosets...

s, birds, lizard
Lizard
Lizards are a widespread group of squamate reptiles, with nearly 3800 species, ranging across all continents except Antarctica as well as most oceanic island chains...

s, and turtle
Turtle
Turtles are reptiles of the order Testudines , characterised by a special bony or cartilaginous shell developed from their ribs that acts as a shield...

s. Visitors are asked to keep to paths and avoid showing or eating foods that the animals might snatch.

Open-range zoos

Some zoos keep fewer animals in larger, outdoor enclosures, confining them with moat
Moat
A moat is a deep, broad ditch, either dry or filled with water, that surrounds a castle, other building or town, historically to provide it with a preliminary line of defence. In some places moats evolved into more extensive water defences, including natural or artificial lakes, dams and sluices...

s and fences, rather than in cages. Safari park
Safari park
A safari park, sometimes known as a wildlife park, is a zoo-like commercial tourist attraction where visitors can drive in their own vehicles or ride in vehicles provided by the facility to observe freely roaming animals...

s, also known as zoo parks and lion farms, allow visitors to drive through them and come in close contact with the animals. The first of this kind of zoo was Whipsnade Park in Bedfordshire, England, opened by the Zoological Society of London in 1931, and covering 600 acres (2.4 km²). Since the early 1970s, a 1,800 acre (7 km²) park in the San Pasqual Valley near San Diego has featured the San Diego Zoo Safari Park, run by the Zoological Society of San Diego. One of two state-supported zoo parks in North Carolina is the 2000 acres (8.1 km²) North Carolina Zoo
North Carolina Zoo
The North Carolina Zoo is located in Asheboro in Randolph County, North Carolina in the Uwharrie Mountains near the geographic center of the state, approximately west of Raleigh, NC, United States. At , it is the largest "walk-through" natural-habitat zoo in the world, the first in the United...

 in Asheboro. The 500 acres (2 km²) Werribee Open Range Zoo
Werribee Open Range Zoo
Werribee Open Range Zoo is an African themed zoo in Werribee, about south-west of Melbourne, Victoria, Australia. It is part of the Zoological Parks and Gardens Board or 'Zoos Victoria' which also includes Melbourne Zoo and Healesville Sanctuary. It is situated on approximately and is located on...

 in Melbourne, Australia, displays animals living in a savannah
Savannah
Savannah or savanna is a type of grassland.It can also mean:-People:* Savannah King, a Canadian freestyle swimmer* Savannah Outen, a singer who gained popularity on You Tube...

.

Public aquaria

The first public aquarium
Public aquarium
A public aquarium is the aquatic counterpart of a zoo, housing living aquatic species for viewing. Most public aquariums feature tanks larger than those kept by home aquarists, as well as smaller tanks. Since the first public aquariums were built in the mid-19th century, they have become popular...

 was opened in London Zoo in 1853. This was followed by the opening of public aquaria in continental Europe (for example, Paris 1859, Hamburg 1864, Berlin 1869, Brighton 1872) and the United States (Boston 1859, Washington 1873, San Francisco Woodward's Garden 1873, New York Battery Park 1896). In 2005 the non-profit Georgia Aquarium
Georgia Aquarium
The Georgia Aquarium, located in Atlanta, Georgia, United States, at Pemberton Place, is the world's largest aquarium with more than of marine and fresh water housing more than 120,000 animals of 500 different species...

 with more than 8 million US gallons (30,000 m³; 30,000,000 litres) of marine and fresh water, and more than 100,000 animals of 500 different species opened in Atlanta, Georgia. The aquarium's specimens include whale sharks and beluga whales.

Roadside zoos

Roadside zoos are found throughout North America, particularly in remote locations. They are small, unregulated, for-profit zoos, often intended to attract visitors to some other facility, such as a gas station. The animals may be trained to perform tricks, and visitors are able to get closer to them than in larger zoos. Since they are unregulated, roadside zoos are notorious for instances of neglect
Neglect
Neglect is a passive form of abuse in which a perpetrator is responsible to provide care for a victim who is unable to care for himself or herself, but fails to provide adequate care....

 and cruelty
Cruelty to animals
Cruelty to animals, also called animal abuse or animal neglect, is the infliction of suffering or harm upon non-human animals, for purposes other than self-defense. More narrowly, it can be harm for specific gain, such as killing animals for food or for their fur, although opinions differ with...

.

Petting zoos

A petting zoo, also called children's farms or children's zoos, features a combination of domestic animals and wild species that are docile enough to touch and feed. To ensure the animals' health, the food is supplied by the zoo, either from vending machines or a kiosk nearby.

Animal Theme Parks

An animal theme park is a combination of an amusement park
Amusement park
thumb|Cinderella Castle in [[Magic Kingdom]], [[Disney World]]Amusement and theme parks are terms for a group of entertainment attractions and rides and other events in a location for the enjoyment of large numbers of people...

 and a zoo, mainly for entertaining and commercial purposes. Marine mammal park
Marine mammal park
A marine mammal park is a commercial theme park or aquarium where marine mammals such as dolphins, beluga whales and sea lions are kept within water tanks and displayed to the public in special shows. A marine mammal park is more elaborate than a dolphinarium, because it also features other marine...

s such as Sea World
SeaWorld
SeaWorld is a United States chain of marine mammal parks, oceanariums, and animal theme parks owned by SeaWorld Parks & Entertainment. The parks feature captive orca, sea lion, and dolphin shows and zoological displays featuring various other marine animals. There are operations in Orlando,...

 and Marineland
Marineland
Marineland can refer to multiple places:*Marineland of Florida, an oceanarium in Florida**Marineland, Florida, the community where the oceanarium is located*MarineLand, an oceanarium/amusement park in Niagara Falls, Ontario, Canada...

 are more elaborate dolphinarium
Dolphinarium
A dolphinarium is an aquarium for dolphins. The dolphins are usually kept in a large pool, though occasionally they may be kept in pens in the open sea, either for research or for public performances...

s keeping whale
Whale
Whale is the common name for various marine mammals of the order Cetacea. The term whale sometimes refers to all cetaceans, but more often it excludes dolphins and porpoises, which belong to suborder Odontoceti . This suborder also includes the sperm whale, killer whale, pilot whale, and beluga...

s, and containing additional entertainment attractions. Another kind of animal theme park contains more entertainment and amusement elements than the classical zoo, such as a stage shows, roller coasters, and mythical creatures. Some examples are Busch Gardens Tampa Bay in Tampa, Florida
Tampa, Florida
Tampa is a city in the U.S. state of Florida. It serves as the county seat for Hillsborough County. Tampa is located on the west coast of Florida. The population of Tampa in 2010 was 335,709....

, Disney's Animal Kingdom
Disney's Animal Kingdom
Disney's Animal Kingdom is an animal theme park located at the Walt Disney World Resort. The fourth park built at the resort, it opened on April 22, 1998, and it is the largest single Disney theme park in the world, covering more than . It is also the first Disney theme park to be themed entirely...

 in Orlando, Florida
Orlando, Florida
Orlando is a city in the central region of the U.S. state of Florida. It is the county seat of Orange County, and the center of the Greater Orlando metropolitan area. According to the 2010 US Census, the city had a population of 238,300, making Orlando the 79th largest city in the United States...

, Flamingo Land in North Yorkshire, England and Six Flags Discovery Kingdom
Six Flags Discovery Kingdom
Six Flags Discovery Kingdom, formerly Six Flags Marine World, Marine World, The New Marine World Theme Park, and Marine World Africa USA, is an animal theme park located in Vallejo, California. The park includes a variety of roller coasters and other amusement rides, along with a collection of...

 in Vallejo, California
Vallejo, California
Vallejo is the largest city in Solano County, California, United States. The population was 115,942 at the 2010 census. It is located in the San Francisco Bay Area on the northeastern shore of San Pablo Bay...

 .

Sources and care of animals

In a modern zoo, about five animals are bred in captivity for every 20 animals on display. When they arrive at the zoo, the animals are placed in quarantine, and slowly acclimatized to enclosures which seek to mimic their natural environment. For example, some species of penguins may require refrigerated enclosures. Guidelines on necessary care for such animals is published in the International Zoo Yearbook.

Conservation and research

The position of most modern zoos in Australasia, Europe, and North America, particularly those with scientific societies, is that they display wild animals primarily for the conservation
Conservation biology
Conservation biology is the scientific study of the nature and status of Earth's biodiversity with the aim of protecting species, their habitats, and ecosystems from excessive rates of extinction...

 of endangered species
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

, as well as for research purposes
Animal testing
Animal testing, also known as animal experimentation, animal research, and in vivo testing, is the use of non-human animals in experiments. Worldwide it is estimated that the number of vertebrate animals—from zebrafish to non-human primates—ranges from the tens of millions to more than 100 million...

 and education, and secondarily for the entertainment of visitors, an argument disputed by critics. The Zoological Society of London states in its charter that its aim is "the advancement of Zoology and Animal Physiology and the introduction of new and curious subjects of the Animal Kingdom." It maintains two research institutes, the Nuffield Institute of Comparative Medicine and the Wellcome Institute of Comparative Physiology. In the U.S., the Penrose Research Laboratory of the Philadelphia Zoo focuses on the study of comparative pathology
Pathology
Pathology is the precise study and diagnosis of disease. The word pathology is from Ancient Greek , pathos, "feeling, suffering"; and , -logia, "the study of". Pathologization, to pathologize, refers to the process of defining a condition or behavior as pathological, e.g. pathological gambling....

. The World Association of Zoos and Aquariums produced its first conservation strategy in 1993, and in November 2004, it adopted a new strategy that sets out the aims and mission of zoological gardens of the 21st century.

The breeding of endangered species is coordinated by cooperative breeding programmes containing international studbooks and coordinators, who evaluate the roles of individual animals and institutions from a global or regional perspective, and there are regional programmes all over the world for the conservation of endangered species
Endangered species
An endangered species is a population of organisms which is at risk of becoming extinct because it is either few in numbers, or threatened by changing environmental or predation parameters...

.

The animal rights
Animal rights
Animal rights, also known as animal liberation, is the idea that the most basic interests of non-human animals should be afforded the same consideration as the similar interests of human beings...

 organization People for the Ethical Treatment of Animals
People for the Ethical Treatment of Animals
People for the Ethical Treatment of Animals is an American animal rights organization based in Norfolk, Virginia, and led by Ingrid Newkirk, its international president. A non-profit corporation with 300 employees and two million members and supporters, it claims to be the largest animal rights...

 (PETA) and the anti-zoo campaign group Captive Animals Protection Society
Captive Animals Protection Society
The Captive Animals' Protection Society is a UK charity campaigning to end the use of animals in entertainment, including circuses, zoos, the exotic pet trade and the audio-visual industry.-History:...

 argue against the position of the zoos that their main purpose is to undertake research and aid in conservation, alleging that most zoo research is geared toward finding new ways to breed and maintain animals in captivity. Andrew Linzey, director of the Oxford Centre for Animal Ethics, argues that zoos make a "minuscule contribution to conservation."

Surplus animals

For every animal caught in the wild, several more are killed in the process. Therefore, the breeding of animals within zoos is encouraged. Eric Baratay and Elisabeth Hardouin-Fugier of the Université Jean-Moulin, Lyon, say that the overall "stock turnover" of animals is one-fifth to one-fourth over the course of a year—with three-quarters of apes dying in captivity within the first twenty months. They say that the high mortality rate is the reason for the "massive scale of importations."

The downside to breeding the animals in captivity is that thousands of them are placed on "surplus lists" each year, and sold to circuses, animal merchants, auctions, pet owners, and game farms. The San Jose Mercury News conducted a two-year study that suggested of the 19,361 mammals that left accredited zoos in the U.S. between 1992 and 1998, 7,420 (38 percent) went to dealers, auctions, hunting ranches, unaccredited zoos and individuals, and game farms.

Zoos have advertised surplus animals in the Animal Finders' Guide, a newsletter in which the owners of hunting ranches post notices of sales and auctions. Matthew Scully
Matthew Scully
-Speechwriting career:Scully worked as a speechwriter in the 2000 presidential campaign, and served as a special assistant and senior speechwriter for President George W. Bush from January 2001 to August 2004. He also wrote speeches for vice-presidents Dan Quayle and Dick Cheney, Governor Robert P...

 writes that many hunters prefer killing animals from zoos because they make better-looking trophies; the mane of a zoo lion will tend to be cleaner than that of a wild lion. In one case, a zoo owner named William Hampton was found to have been buying animals and systematically slaughtering them in order to sell their skins, heads, and pelts as trophies.

Animals that breed frequently, such as deer, tigers, and lions may be killed for their meat; Nuremberg zoo's deputy director, Helmut Mägdefrau, has said, "If we cannot find good homes for the animals, we kill them and use them as feed." Other animals may be sold to smaller zoos with poor conditions. PETA cites the example of Edith, a chimpanzee found in a concrete pit in a roadside zoo called the Amarillo Wildlife Refuge in Texas. She had been born in the Saint Louis Zoo, but had been sold just after her third birthday, and for the next 37 years was passed around five other facilities before landing in the roadside zoo.

It was alleged in March 2008 that hundreds of the Berlin Zoo's 23,000 animals are missing, amid allegations that they have been slaughtered, and that some tigers and leopards were sent to China to make drugs for traditional Chinese medicine. Claudia Hämmerling, a Green Party politician, said she had evidence that four Asian black bears and a hippopotamus were taken from Berlin to go to a new home, but were transported instead to Wortel in Belgium, which The Guardian reports has no zoo, but does have a slaughterhouse
Slaughterhouse
A slaughterhouse or abattoir is a facility where animals are killed for consumption as food products.Approximately 45-50% of the animal can be turned into edible products...

. The zoo's director, Bernhard Blaszkiewitz, replied that the allegations were "untruths, half-truths and lies."

Condition of the animals

The condition of the animals varies widely, especially in zoos in countries with little or no regulations. The majority of the large non-profit and scientifically oriented institutions are working to improve their animal enclosures, although constraints like size and expense make it difficult to create ideal captive environments for some species, such as dolphins and whales.
Some critics argue that animals that live in zoos are treated as voyeuristic objects rather than living creatures, and are often driven to insanity in the transition from being free and wild to incarcerated and dependent on humans for survival.

A four-decade Oxford University study found that polar bears, lions, tigers, and cheetahs show the most evidence of stress in captivity. A PETA investigation of zoos in the U.S. found that several bear species were engaging in neurotic, stereotypical behavior, including pacing, walking in circles, and swaying or rolling their heads. The Badaltearing Safari Park in China keeps a pair of moon bears in cages so small that they are unable to turn around. The Daily Mail reported in January 2008 that one of them appeared to have gone insane and spends its time shaking its head and banging into the sides of the cage.

Live feeding

In the Badaltearing Safari Park in China, zoo visitors can throw live goats into the lions' enclosure and watch them being eaten, or can purchase live chicken
Chicken
The chicken is a domesticated fowl, a subspecies of the Red Junglefowl. As one of the most common and widespread domestic animals, and with a population of more than 24 billion in 2003, there are more chickens in the world than any other species of bird...

s tied to bamboo
Bamboo
Bamboo is a group of perennial evergreens in the true grass family Poaceae, subfamily Bambusoideae, tribe Bambuseae. Giant bamboos are the largest members of the grass family....

 rods for the equivalent of 2 dollars\euros to dangle into lion pens. Visitors can drive through the lion's compound on buses with specially designed chutes leading into the enclosure into which they can push live chickens. In the Xiongsen Bear and Tiger Mountain Village near Guilin in south-east China, live cows and pigs are thrown to tigers to amuse visitors. In the Qingdao zoo, visitors engage in "tortoise baiting", where tortoises are kept inside small rooms with elastic bands round their necks, so that they are unable to retract their heads. Visitors then throw coins at them. The marketing claim is that if you hit one of them on the head and make a wish, it will be fulfilled.

United States of America

In the United States, any public animal exhibit must be licensed and inspected by the United States Department of Agriculture
United States Department of Agriculture
The United States Department of Agriculture is the United States federal executive department responsible for developing and executing U.S. federal government policy on farming, agriculture, and food...

, United States Environmental Protection Agency
United States Environmental Protection Agency
The U.S. Environmental Protection Agency is an agency of the federal government of the United States charged with protecting human health and the environment, by writing and enforcing regulations based on laws passed by Congress...

, Drug Enforcement Agency, Occupational Safety and Health Administration
Occupational Safety and Health Administration
The United States Occupational Safety and Health Administration is an agency of the United States Department of Labor. It was created by Congress of the United States under the Occupational Safety and Health Act, signed by President Richard M. Nixon, on December 29, 1970...

, and others. Depending on the animals they exhibit, the activities of zoos are regulated by laws including the Endangered Species Act
Endangered Species Act
The Endangered Species Act of 1973 is one of the dozens of United States environmental laws passed in the 1970s. Signed into law by President Richard Nixon on December 28, 1973, it was designed to protect critically imperiled species from extinction as a "consequence of economic growth and...

, the Animal Welfare Act, the Migratory Bird Treaty Act of 1918
Migratory Bird Treaty Act of 1918
The Migratory Bird Treaty Act of 1918 , codified at , is a United States federal law, at first enacted in 1916 in order to implement the convention for the protection of migratory birds between the United States and Great Britain...

 and others.Grech, Kali S. "Overview of the Laws Affecting Zoos", Michigan State University College of Law, Animal Legal & Historical Center, 2004. Additionally, zoos in North America may choose to pursue accreditation by the Association of Zoos and Aquariums
Association of Zoos and Aquariums
The Association of Zoos and Aquariums was founded in 1924 and is a nonprofit organization dedicated to the advancement of zoos and public aquariums in the areas of conservation, education, science, and recreation.The AZA headquarters is located in Silver...

 (AZA). To achieve accreditation, a zoo must pass an application and inspection process and meet or exceed the AZA's standards for animal health and welfare, fundraising, zoo staffing, and involvement in global conservation efforts. Inspection is performed by three experts (typically one veterinarian, one expert in animal care, and one expert in zoo management and operations) and then reviewed by a panel of twelve experts before accreditation is awarded. This accreditation process is repeated once every five years. The AZA estimates that there are approximately 2,400 animal exhibits operating under USDA license as of February 2007; fewer than 10% are accredited.

Europe

In April 1999, the European Union
European Union
The European Union is an economic and political union of 27 independent member states which are located primarily in Europe. The EU traces its origins from the European Coal and Steel Community and the European Economic Community , formed by six countries in 1958...

 introduced a directive to strengthen the conservation role of zoos, making it a statutory requirement that they participate in conservation and education, and requiring all member states to set up systems for their licensing and inspection. Zoos are regulated in the UK by the Zoo Licensing Act of 1981, which came into force in 1984. A zoo is defined as any "establishment where wild animals are kept for exhibition ... to which members of the public have access, with or without charge for admission, seven or more days in any period of twelve consecutive months," excluding circuses and pet shops. The Act requires that all zoos be inspected and licensed, and that animals kept in enclosures are provided with a suitable environment in which they can express most normal behavior.

See also

  • List of zoos
    • Wildlife refuge
      Wildlife refuge
      A wildlife refuge, also called a wildlife sanctuary, may be a naturally occurring sanctuary, such as an island, that provides protection for species from hunting, predation or competition, or it may refer to a protected area, a geographic territory within which wildlife is protected...

    • International Park
    • Fossil Parks
    • National Park
      National park
      A national park is a reserve of natural, semi-natural, or developed land that a sovereign state declares or owns. Although individual nations designate their own national parks differently A national park is a reserve of natural, semi-natural, or developed land that a sovereign state declares or...

    • National Forest
    • International Network of Geoparks
      International Network of Geoparks
      The Global Geoparks Network is a UNESCO programme established in 1998. Managed under the body’s Ecological and Earth Sciences Division, the GGN seeks the promotion and conservation of the planet’s geological heritage, as well as encourages the sustainable research and development by the concerned...

  • List of zoo associations
  • Animals in captivity
    Captivity (animal)
    Animals that live under human care are in captivity. Captivity can be used as a generalizing term to describe the keeping of either domesticated animals or wild animals. This may include for example farms, private homes and zoos...

    • Environmental enrichment
  • Conservation
    Conservation biology
    Conservation biology is the scientific study of the nature and status of Earth's biodiversity with the aim of protecting species, their habitats, and ecosystems from excessive rates of extinction...

    • Wildlife conservation
      Wildlife conservation
      Wildlife conservation is the preservation, protection, or restoration of wildlife and their environment, especially in relation to endangered and vulnerable species. All living non-domesticated animals, even if bred, hatched or born in captivity, are considered wild animals. Wildlife represents all...

      • Ex-situ conservation
        Ex-situ conservation
        Ex-situ conservation means literally, "off-site conservation". It is the process of protecting an endangered species of plant or animal outside of its natural habitat; for example, by removing part of the population from a threatened habitat and placing it in a new location, which may be a wild...

      • In-situ conservation
        In-situ conservation
        In-situ conservation is on-site conservation or the conservation of genetic resources in natural populations of plant or animal species, such as forest genetic resources in natural populations of tree species...

    • Conservation movement
      Conservation movement
      The conservation movement, also known as nature conservation, is a political, environmental and a social movement that seeks to protect natural resources including animal, fungus and plant species as well as their habitat for the future....

    • List of Conservation topics
    • Virtual Zoo
      Virtual Zoo
      A virtual zoo is a new concept that uses the zoo model in a web format . Virtual zoos are basically websites that are created to simulate a visit to a zoo, and the visitors to these sites can view exhibits about animals and their habaits. Many Zoos as well as schools have developed virtual zoos...

  • Extinction
    Extinction
    In biology and ecology, extinction is the end of an organism or of a group of organisms , normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point...

    • Endangered species
      Endangered species
      An endangered species is a population of organisms which is at risk of becoming extinct because it is either few in numbers, or threatened by changing environmental or predation parameters...

  • Zoo Emergency Response Team
    Emergency Response Team (Zoo)
    Zoo Emergency Response Teams, also called Emergency Weapons Teams or Firearms Emergency Response Teams, are teams that respond when zoo animals escape their enclosure and threaten zoo visitors and employees.-Duties:...

  • Zoology
    Zoology
    Zoology |zoölogy]]), is the branch of biology that relates to the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct...

     (includes a list of prominent zoologists)
  • Immersion exhibit
    Immersion exhibit
    An immersion exhibit is a naturalistic zoo environment that gives visitors the sense they're actually in the animals' habitats. Buildings and barriers are hidden...

  • Frozen Zoo
    Frozen zoo
    A frozen zoo is a storage facility in which genetic materials taken from animals are gathered and thereafter stored at very low temperatures for optimal preservation over a long period of time...


External Links

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