Those would be the garden variety of snakes, garter snake, grass snake, they go by numerous names. But in LA they do have poisonous snakes.
We have lots of the harmless ones here, no poisonous one. I have the stripped grass snake, gopher snakes (get quite large) and the Rubber Boa (comes out only at night). All harmless and great to have in the garden. The grass snakes eat small bugs, insects and slugs. The Gopher Snake eats gophers, other rodents and eggs from ground nesting birds. The Rubber Boa eats mostly baby mice and rats. It also is a very docile snake.
