The diverse vegetation of the broader region that includes Yucaipa provides habitat for more than 1,600 plant species and 440 wildlife species, including butterflies, fish, amphibians, reptiles, birds, and mammals. The area supports many resident and migratory bird species, and the vast expanses of grassland and open, rolling oak savannah provide excellent foraging habitat for birds of prey. Protected species, such as the mountain yellow-legged frog and the California spotted owl, among many others, live in the vicinity of Yucaipa.

The open habitats surrounding Yucaipa are traversed by wildlife moving between the San Bernardino National Forest and the Badlands mountain range in Riverside County. Crafton Hills is an important wildlife corridor that connects the Live Oak-San Timoteo Canyons to the San Bernardino National Forest. The Millcreek region on Yucaipa’s northern boundary and Wildwood Canyon area are also wildlife corridors into the San Bernardino National Forest.

Yucaipa’s natural habitats support a wide range of wildlife. These include mule deer, desert cottontail, deer mouse, and several birds, such as California quail, red-tailed hawk, western meadowlark, Bewick’s wren, Bullock’s oriole, white-tailed kite, towhee, and phainopepla. The Yucaipa valley is also home to coyotes, mountain lions, and bears. To reduce potential conflicts with wildlife, the Yucaipa Animal Placement Society works with surrounding agencies to implement the Yucaipa Wildlife Corridor Program.

A broad range of organizations assist in preserving Yucaipa’s natural terrain and wildlife. These include the Inland Empire Resource Conservation District, California Department of Fish and Wildlife, Crafton Hills Open Space Conservancy, Wildlands Conservancy, and other local, state, and federal agencies.