Physical Description
Length: 8-14 inches including tail.
Colors and markings are diverse in Crotaphytus collaris. They are sexually dimorphic. Males tend to be green to tan colored with patterns of dorsal spots and bars to a speckled pattern across the dorsum. Male C. collaris can also exhibit vivid yellow and orange head coloration. Female C. collaris tend to be less colorful except during breeding season when they exhibit bright orange side spots or bars. Both male and female C. collaris possess two prominent collar-like black bands at their neck, hence their name (Jones, 1997).