"Sauromalus hispidus" (spiny chuckwalla), and "Uta stansburiana" (common side-blotched lizard). The San Esteban chuckwalla is endemic to San Esteban Island in the Gulf of California. The peninsular chuckwalla ("Sauromalus australis") is a lizard belonging to the family Iguanidae. Discovery rig features sea horses, discus, triggerfish, a dogface puffer, a chuckwalla and more. Primarily herbivorous, the chuckwalla eats creosote bush flowers, leaves, fruit, and occasionally insects. A chuckwalla is a lizard of the species "Sauromalus". In the Chuckwalla Mountains, naturalist Edmund C. Jaeger discovered the hibernating common poorwill. The track test was performed at Chuckwalla Valley Raceway. Currently STAR School operates out of Chuckwalla Valley Raceway in Desert Center, CA. "Sauromalus ater" (common chuckwalla), and "Sceloporus angustus" (Isla Santa Cruz sator). The Chuckwalla Range is divided from the Little Chuckwalla Range by Graham Pass. The Little Chuckwalla Mountains are a mountain range in southeastern Riverside County, California.