Winter Raptor Central: Columbia Basin Loop Drive Professional Review and Guide
"See lots of raptors from your car this weekend. Large birds of prey concentrate in eastern Washington in the winter, and it’s easy to see them in the sky, in trees, on fences, on the ground. All along your drive, watch for hawks sitting on telephone and power poles and crossbars.
Red-tailed hawks and northern harriers are common residents of Washington; rough-legged hawks are here only in winter. Watch for short-eared owls on fence posts, signposts, farm implements, and tussocks or hammocks on the ground. Watch for long-eared and great horned owls in trees and kestrels on telephone or power lines."