85 species of birds have been observed with breeding activity of 32-64 probable. 12 species of raptors were observed. Nesting of 7 was confirmed including American kestrel ("Falco sparverius"), barn owl ("Tyto alba"), screech owl ("Otus asio"), red-shouldered hawk ("Buteo lineatus"). The turkey vulture ("Cathartes aura") and the prairie falcon ("Falco mexicanus") breed on adjacent slopes. Cooper’s hawk ("Accipiter cooperi") and northern harrier ("Circus cyanus") may nest in Oak Park. Golden eagles ("Aquila chrysaetos") lack suitable nesting habitats and probably live in nearby areas. Two non-raptor birds are classified as sensitive including coastal black-tailed gnatcatcher ("Polioptila melanura californica"). Possibly less than 1600 pairs of this bird remain alive. The second is grasshopper sparrow ("Ammodramus savannarum").