1. The common Collared lizard (Crotaphytus collaris), also called eastern Collared lizard, Oklahoma Collared lizard, yellow-headed Collared lizard or Collared lizard, is a North American species of lizard from the family Crotaphytidae

2. The eastern Collared lizard, often called the mountain boomer, is the Oklahoma state lizard

3. With a large head and powerful jaws.The name "Collared lizard" comes from the lizard's distinct coloration, which includes bands of black around the neck and

4. Collared lizard, (genus Crotaphytus), any of nine species of lizards belonging to the lizard subfamily Crotaphytinae (family Crotaphytidae) found in hilly areas of the central United States and northeastern Mexico westward to the Great Basin.The coloration and pattern of Collared lizards varies depending on species; however, coloration also varies with the season, temperature, and light intensity.