Range Description: Northern Saw-whet Owl - Aegolius acadicus

Summary of the extent of the breeding, wintering, migration and year-round range of this species in the Western Hemisphere, including Canada, U.S.A. and Mexico:

Canada - Resident year-round: 2,630,868 square km; Wintering only: 240,806 square km
Mexico - Resident year-round: 250,469 square km; Wintering only: 18,677 square km
U.S.A. - Resident year-round: 2,817,068 square km; Wintering only: 4,844,720 square km