A number of species have fragmented populations or low population numbers, including the coast-patched nose snake (Salvadora hexalepis virgultea), the venomous red-diamond rattlesnake (Crotalus ruber), and the western ringneck snake (Diadophis punctatus).    From Wordnik.com.  [Biological diversity in the California Floristic Province] Reference

Snake, Ringneck Diadophis punctatus 230, 243.    From Wordnik.com.  [The Field Guide to Wildlife Habitats of the Eastern United States] Reference