Red-eared slider
Overview
The red-eared slider is a semiaquatic 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...

 belonging to the family Emydidae
Emydidae
Emydidae, commonly called the pond turtles or marsh turtles, is a family of turtles. Previously, several species of Asian box turtle were classified in the family. However, revised taxonomy has separated them to a different family. Now, Emydidae, with the exception of two species of pond turtle,...

. It is a subspecies of pond slider
Trachemys scripta
Trachemys scripta, better known as the pond slider, is a common, medium-sized semi-aquatic turtle. There are three subspecies of sliders. The most recognizable subspecies is the red-eared slider , which is popular in the pet trade. This subspecies has been introduced to other parts of the world...

. It is the most popular pet turtle in the United States and also popular in the rest of the world. It is native only to the southern United States, but has become established in other places because of pet releases and has become an invasive species
Invasive species
"Invasive species", or invasive exotics, is a nomenclature term and categorization phrase used for flora and fauna, and for specific restoration-preservation processes in native habitats, with several definitions....

 in many introduced areas, like California
California
California 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...

, where it outcompetes the native western pond turtle
Western pond turtle
The western pond turtle , or Pacific pond turtle is a small to medium-sized turtle growing to approximately 20 cm in carapace length. It is limited to the west coast of the United States of America and Mexico, ranging from western Washington state to northern Baja California...

.
Red-eared sliders get their name from the distinctive red patch of skin around their ears.
 
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