Solitary Vireo
Encyclopedia
"Solitary Vireo" is a collective term for certain vireo
s. These were formerly believed to make up a single species
Vireo solitarius, but are now treated as three allopatric species:
Vireo
The vireos are a group of small to medium-sized passerine birds restricted to the New World. They are typically dull-plumaged and greenish in color, the smaller species resembling wood warblers apart from their heavier bills...
s. These were formerly believed to make up a single 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...
Vireo solitarius, but are now treated as three allopatric species:
- Cassin's VireoCassin's VireoCassin's Vireo is a small North American songbird, ranging from southern British Columbia in Canada through the western coastal states of the United States. This bird migrates, spending the winter from southern Arizona to southern Mexico.The vireo is 11–14 cm in length, with a gray head, back,...
, Vireo cassinii - west of the Rocky MountainsRocky MountainsThe Rocky Mountains are a major mountain range in western North America. The Rocky Mountains stretch more than from the northernmost part of British Columbia, in western Canada, to New Mexico, in the southwestern United States...
from southwestern CanadaCanadaCanada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...
to CaliforniaCaliforniaCalifornia is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area... - Plumbeous VireoPlumbeous VireoThe Plumbeous Vireo is a small North American songbird, ranging from far southeastern Montana and western South Dakota south to the Pacific coast of Mexico, including the extreme southern regions of Baja California Sur...
, Vireo plumbeus - USA east of the Rocky Mountains from southwesternmost MontanaMontanaMontana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...
to western MexicoMexicoThe United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of... - Blue-headed VireoBlue-headed VireoThe Blue-headed Vireo is a Neotropical migrating song bird found in North and Central America. There are currently two recognized sub-species that belong to the Blue-headed Vireo. It has a range that extends across Canada and the eastern coast of the United-States, Mexico and some of Central America...
, Vireo solitarius proper - Canada east of the Rocky Mountains to northeastern USA