The eastern collared lizard ( `` Crotaphytus collaris '' ) , also called common collared lizard , Oklahoma collared lizard or collared lizard , is a North American lizard that can reach in length ( including the tail ) , with a large head and powerful jaws .
The common collared lizard or Oklahoma lizard , `` Crotaphytus collaris '' , is a North American lizard that can reach a foot ( 30 cm ) long in length ( including the tail ) , with a large head and powerful jaws . It is the state lizard of Oklahoma .