Thousands of Vaux’s swifts (Chaetura vauxi) fly into the chimney at the Wagner Performing Arts Center in Monroe, Washington. As many as 26,000 Vaux’s swifts use the chimney as a roost each night during their spring and fall migrations. Vaux’s swifts do not have back talons, so they cannot stand or perch; when roosting for the night, they cling to rough surfaces, mainly old-growth trees and the inside of old chimneys. They spend their days in flight catching insects and at night roost communally to conserve heat. The migratory roost in Monroe is one of the largest in North America.
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