Coluber fuliginosus - Baja California Coachwhip

Light phase Adult, San Bartolo

Dark phase adult, Baja California Norte © Chris Gruenwald

References:

Grismer, L. Lee. Amphibians and Reptiles of Baja California, Including Its Pacific Islands and the Islands in the Sea of Cortés. The University of California Press, 2002.

McPeak, Ron H. Amphibians and Reptiles of Baja California. Sea Challengers, 2000.

San Diego Natural History Museum