Geographical distribution of Northern saw-whet owl.    Breeding  Year-round  Nonbreeding  Nonbreeding (scarce)
Rasmussen, J. L., S. G. Sealy, and R. J. Cannings (2008). Northern Saw-whet Owl (Aegolius acadicus), version 2.0. In The Birds of North America (A. F. Poole, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi-org.acces.bibl.ulaval.ca/10.2173/bna.42
Cephas