Mammals:
* Small Mammals: Mice, rats, squirrels, rabbits, opossums, skunks, raccoons
* Larger Mammals: Coyotes, bobcats, foxes, deer (occasionally)
Birds:
* Common Birds: Doves, sparrows, hawks, owls, hummingbirds, woodpeckers
* Waterfowl: Ducks, geese, herons, egrets
Reptiles:
* Lizards: Whiptails, fence lizards, chuckwallas
* Snakes: Gophersnakes, garter snakes, rattlesnakes (rare)
Amphibians:
* Frogs: Pacific tree frogs, California red-legged frogs
* Toads: Western toad
Insects:
* Bees: Honeybees, bumblebees
* Butterflies: Monarch butterflies, swallowtail butterflies
* Other Insects: Ants, beetles, grasshoppers
Fish:
* Fish: Carp, catfish, bass (in the nearby Los Angeles River)
It's important to note that the exact species present may vary depending on the time of year and environmental conditions.
It's crucial to remember that the Sepulveda Basin Wildlife Reserve is a protected area, and it's important to respect the wildlife and their habitat. Please observe wildlife from a distance and avoid disturbing them or their nests.