Califonia Oak Foundation

Chevron Corporation

The Dean Witter Foundation

Department of Defense/US Navy

Environmental Systems Research Incorporated

Golden Gate National Recreation Area

Hastings Natural History Reservation (University of California Natural Reserve)

The Hewlett Foundation

The Institute for Bird Populations

Integrated Hardwood Management Program

Kern River Research Center

Klamath Bird Observatory

Marin Municipal Water District

The National Audubon Society/Audubon California

The National Fish and Wildlife Foundation

The National Park Service

Natural Resources Conservation Service

The Nature Conservancy

Peter Knapp Photography

PRBO Conservation Science

San Francisco Bay Bird Observatory>

Sea and Sage Audubon

Sierra Nevada Field Campus of San Francisco State University

Shell Oil Company Foundation

USDA Forest Service

University of California Cooperative Extension

United States Bureau of Reclamation

United States Fish and Wildlife Service

United States Geological Survey

Ventana Wilderness Society/Big Sur Ornithology Lab