Pituophis catenifer catenifer

Constrictor whose diet consists of mostly of small mammals, birds & their eggs. Lizards & insects are also consummed occasionally.
Commonly seen on trails, active during the days & hot nights, a good burrower, climber, & swimmer.

For more information: http://www.californiaherps.com/snakes/pages/p.c.catenifer.html#description