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Blunt-nosed Leopard Lizard Gambelia sila (Crotaphytus wislizeni silus)


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Blunt-nosed Leopard Lizard
© U. S. Fish and Wildlife Service

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Alternate name: Bluntnose Leopard Lizard

Family: Crotaphytidae, Collared and Leopard Lizards view all from this family

Description Blunt nose, short head. Round tail. Gray/brown with yellow/whitish cross bands with dark edged brown spots. Blotched gray throat.

Dimensions 20.3-23.5cm. (8-9 1/4")

Endangered Status The Blunt-nosed Leopard Lizard is on the U.S. Endangered Species List. It is classified as endangered in California. Because much of its former habitat in the San Joaquin Valley has been converted to farms and communities, the Bluntnose Leopard Lizard is threatened with extinction. It has shared this fate with other animals of the California grasslands, including the San Joaquin Kit Fox and the Giant Kangaroo Rat. In addition to agriculture and residential development, mining, oil-drilling, road building, and the construction of the water-management infrastructure have contributed to the degradation of the once-expansive grassland habitat.

Breeding One clutch per year. June/July 2-5 eggs laid. Hatch July/August.

Habitat Canyon floors and sparsely vegetated foothills.

Range Foothills of San Joaquin Valley, California.

Discussion Diurnal. They use small rodent burrows for shelter from predators and temperature extremes. Burrows are usually abandoned ground squirrel tunnels, or occupied or abandoned kangaroo rat tunnels. Each lizard uses several burrows without preference. In areas of low mammal burrow density, lizards will construct shallow, simple tunnels in earth berms or under rocks. Potential predators are numerous including snakes, predatory birds and most carnivorous valley mammals.