#17183 Picture of a Collard Lizard (Crotaphytus collaris) Sunning With Its Belly Down on a Warm, Hot Rock

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The Oklahoma Collared Lizard, Common Collared Lizard, Collared Lizard, Mountain Boomer (Crotaphytus collaris) is a North American lizard that can measure up to 1 foot in length with the tail included. This lizard has a big head and strong jaws and is well known for the ability to run on their hind legs, resembling small dinosaurs. The collared lizard is the "state reptile" of the state of Oklahoma in the United States, where it is called the Mountain Boomer. The Collared Lizard has bands of black aroud the neck and shoulders that look like a collar, hence the name and of course is a member of the collared lizard family.

Collard Lizards are able to be tamed and kept as pets. When born in captivity, they are docile and tolerant of humans. They are very active and predatory lizards, and need a large area to run. They like high temperatures near 105-110°F at their basking spots and 80°F (26°C) elsewhere in their habitat. Some collared lizards eat small amounts of fruit or vegetables, but generally prefer insects. They will also eat small mammals and other lizards. In captivity, they need to be fed a diet with extra calcium and a light source with a UVB radiation to reduce bone disorder risks.

Collared lizards have record speeds near 16 miles hour of running on their hind legs. This is actually quite a bit slower than the world record for lizards which is 21.5 miles an hour which has attained by the Costa Rica spiny-tailed iguana (Ctenosaura similis).