Western yellow-bellied racer

The western yellow-bellied racer (Coluber constrictor mormon),^[1] also known as the western yellowbelly racer^[2] or western racer,^[1] is a snake subspecies endemic to the Western United States, including California, Oregon, Washington, Idaho, Nevada, New Mexico, Utah, Montana and Colorado.^[3][4] It is a subspecies of the eastern racer. It is nonvenomous^[5] and is recognized by its long and very slender shape.^[6][7] It is visually similar to the eastern yellow-bellied racer, which is also green, blue or brown with a recognizable yellow underside. Also named for its color, the western yellow-bellied racer is also gray with red or brown blotches when young.^[8][9]

Western yellow-bellied racer
Closeup of the head of a western yellow-bellied racer in Washington state.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Serpentes
Family:	Colubridae
Genus:	Coluber
Species:	C. constrictor
Subspecies:	C. c. mormon
Trinomial name
Coluber constrictor mormon (Baird & Girard, 1852)