The patterned colors of a mountain kingsnake are hard to miss. The snake’s white-black-red-black-white triads attract attention in just about any habitat. (The amount of red can vary in an individual as well as subgroup.)
Traditionally California mountain kingsnakes (Lampropeltis zonata) have been grouped into several subspecies according to subtle and variable pattern characteristics.
The kingsnake in the title photograph appears to belong to the San Diego mountain kingsnake pattern class (Lampropeltis zonata pulchra). The broken white ring on the head is common in this subgroup in the Santa Monica Mountains.
This mountain kingsnake, photographed on Pleasant View Ridge in the San Gabriel Mountains, likely belongs to the San Bernardino mountain kingsnake pattern class, Lampropeltis zonata parvirubra.
Study of California mountain kingsnakes’ mitochondrial DNA (E. A. Myers, et. al., 2013) conservatively supports separate northern and southern species and potentially two lineages within the southern group.
Mountain kingsnakes aren’t the only kingsnake found in the Los Angeles area. This California kingsnake (Lampropeltis getula californiae) was photographed at Ahmanson Ranch a couple of weeks ago. When I approached the snake, it immediately became defensive and started rapidly vibrating its tail. This behavior is often described as mimicking a rattlesnake, but could also predate the development of rattles in rattlesnakes.
For more info on the reptiles and amphibians of California see the californiaherps.com web site.