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The birds wait on a high perch at night and swoop down on prey. They mainly eat small organisms with a strong focus on small mammals in their diet. Swengel and Swengel (1992) reviewed ten studies that found northern saw-whet owls eating almost exclusively mammals (88% to 100%), with most of the mammals being rodents (85% to 99+%).
The AOS Checklist of North American Birds is a checklist of the bird species found in North and Middle America which is now maintained by the American Ornithological Society (AOS). The checklist was originally published by the AOS's predecessor, the American Ornithologists' Union (AOU). The Union merged with the Cooper Ornithological Society in ...
The code of nomenclature and check-list of North American birds adopted by the American Ornithologists' Union; being the report of the Committee of the Union on ...
For species found in the 50 states, Puerto Rico, and the U.S. Virgin Islands, the taxonomic treatment (designation and sequence of orders, families and species) and nomenclature (common and scientific names) used in the list are those of the AOS, the recognized scientific authority on the taxonomy and nomenclature of North and Middle American birds.
The taxonomic treatment [3] (designation and sequence of orders, families and species) and nomenclature (common and scientific names) used in the accompanying bird lists adheres to the conventions of the AOS's (2019) Check-list of North American Birds, the recognized scientific authority on the taxonomy and nomenclature of North America birds.
This page was last edited on 4 September 2020, at 12:57 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
It contains 592 pages and every species recorded in North America up until 2016. [8] This most recently updated version contains 37 new species accounts, 80 new maps, 350 map revisions, and approximately 300 new illustrations. [8] One of the most significant edits is the update of illustrations for North American hummingbirds. [8]
A pink-sided dark-eyed junco in Elizabeth, Colorado. A junco (/ ˈ dʒ ʌ ŋ k oʊ /), genus Junco, is a small North American bird in the New World sparrow family Passerellidae. Junco systematics are still confusing after decades of research, with various authors accepting between three and twelve species.
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