Raptor Nesting and Habitat Survey in the Ross Lake Drainage, Washington, 1987
Raptor Nesting and Habitat Survey in the Ross Lake Drainage, Washington, 1987
by Jonathan Bjorklund, David Drummond, National Park Service
Helicopter nesting and habitat survey of peregrine falcon, bald eagle, golden eagle, and osprey. Ground survey of spotted, barred and great gray owls in the Ross Lake Drainage, Washington State.