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Lizards

Eastern Collared Lizard

Crotaphytus collaris

Across the regions where it's common, the Eastern Collared Lizard peaks from April to August.

Shows up in 10 ecoregions and 8 states

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Lizards

Eastern Collared Lizard

Crotaphytus collaris

Look, don't take. Many states regulate collecting reptiles and amphibians. Photograph it, log it on iNaturalist and leave it where you found it.

Description

The common collared lizard (Crotaphytus collaris), also commonly called eastern collared lizard, Oklahoma collared lizard, mountain boomer, yellow-headed collared lizard, and collared lizard, is a North American species of lizard in the family Crotaphytidae. C. collaris can grow from 8 to 15 in (20 to 38 cm) in total length (including the tail), with a large head and powerful jaws.Wikipedia ↗

Habitat

C. collaris is chiefly found in dry, open regions of northern Mexico and the Southwestern United States, including Arizona, Arkansas, Colorado, Kansas, Missouri, New Mexico, Oklahoma, and Texas. Individuals occupy a range of different habitats from rocky desert landscapes to grasslands, but they often prefer to inhabit mountainous regions with high environmental temperatures for optimal thermoregulation.Wikipedia ↗

When it's active

Generally, males are more active than females, as the former engage in more chase, fight, display, and courtship behaviors, while the latter exhibit basking and foraging behaviors. In relation, male territorial behaviors also vary within the reproductive season, decreasing in June due to the higher prevalence of reproductively active females and instead engaging in more courtship behaviors.Wikipedia ↗
Kaden Slone · CC BY 4.0

When and where it's active

Each row is its own calendar, counted from records in that area. Seasons shift by place.

PeakShoulderQuiet

Ecoregions

States

About the Eastern Collared Lizard

When is the Eastern Collared Lizard most active?

Across the regions where it's common, the Eastern Collared Lizard peaks from April to August.

Where does the Eastern Collared Lizard live?

It has enough records to show in 10 ecoregions and 8 states, including Arizona, Colorado, Kansas, and Missouri.