Reptiles include the common garter snake and northern alligator lizard. The gestation period for the Mexican alligator lizard is approximately 6-8 months. Reptiles are not common, but include rubber boa, western fence lizard, and northern alligator lizard. The northern alligator lizard is a medium-sized slender lizard. The Mexican alligator lizard occurs in mesic, montane forest environments. The Mexican alligator lizard is considered an Endangered species on the IUCN Red List. The Panamint alligator lizard ("Elgaria panamintina") is a species of lizard in the Anguidae family. The Texas alligator lizard is a relatively slow, diurnal lizard, with quite good vision.