Spring is coming. So snakes, lizards and turtles — all are reptiles and vertebrates (that means they have backbones) — will be out in force as early as March. Any spate of warm days could awaken these leg-less creatures from hibernation. Snakes could be roaming farther from burn areas this spring in search of a new food supply, say ecologists.

http://www.sgvtribune.com/in-defense-of-snakes-and-lizards-in-southern-california

It may be surprising or even a little disappointing, but the iconic black bears that roam wild in the San Bernardino and San Gabriel mountains didn’t arrive there in ancient times through a process of natural migration, but instead they arrived in 1933, in crates, in the back of trucks.

https://www.redlandsdailyfacts.com/2019/01/07/those-black-bears-you-see-in-southern-california-this-is-how-they-arrived/

It's the mid-winter, and with coming rains, coyote mating season and spring citrus ripening, watch for small mammals and their predators.

https://patch.com/california/glendora/how-keep-coyote-safe-san-gabriel-valley-glendora