Slide Across the Strait: Coastal Raptor Migration at Cape Flattery Professional Review and Guide
"When the winds blow from the east, conditions are perfect for raptors to soar high in the sky and glide across the 13 miles of open water from Washington to Vancouver Island. Begin watching the first of April for light east winds and clear weather with rising temperatures.
For several weeks in the spring, large numbers of raptors (mostly red-tailed and sharp-shinned hawks with medium numbers of American kestrels, northern harriers, and turkey vultures and a few Cooper’s hawks, northern goshawks, merlins, peregrine falcons, golden eagles, and osprey) arrive at Neah Bay along with sandhill cranes from their wintering sites in the south. Bald eagles also fly over, but many of them are residents."