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- American Ornithological Union (AOU) Bird Species List 1
- Bird Species List
- Bird Species on Toppenish National Wildlife Refuge
- Bird Name Alpha Codes - Page 1 of 8
- Checklist of the Birds of Colorado - 513 Species
- Anatomical Adaptations to Sperm Competition in Smith's Longspurs and Other Polygynandrous Passerines
- Transactions of the Linnaean Society of New York, Volume 6, Studies In
- Bird List 4A.Xlsx
- Common Kansas Backyard Birds
- Volume 2, Chapter 16-7: Bird Nests-Passeriformes, Part 2
- Birds List for Carlsbad Caverns Np
- Bird Checklist for Western Prairie
- Monitoring Neotropical and Migratory Birds in Alaska
- The Riverlands Migratory Bird Sanctuary (RMBS)
- American Tree Sparrow (Spizella Arborea) Vulnerability: Increase Likely Confidence: Moderate
- Temporal Patterns of Territorial Behavior and Circulating Testosterone in the Lapland Longspur and Other Arctic Passerines1
- Winter 2021 Brooklyn Bird Club’S the Clapper Rail Winter 2021 Inside This Issue
- Official List of the Birds of Tennessee
- Lost Trail National Wildlife Refuge Bird List (As of 4/20/2014)
- “SAGEBRUSH” BREWER's SPARROW Spizella Breweri Breweri
- Federal Register/Vol. 83, No. 229/Wednesday, November 28
- A New Genus for the American Tree Sparrow (Aves: Passeriformes: Passerellidae)
- Checklist of the Birds of California
- Decline of the North American Avifauna
- Coming! a New Official Checklist of North American Birds -A Revolution
- Bird Species List for Glacier Creek Preserve This Bird Species List Includes Observations and Documented Surveys Ranging from the Late 1990'S to Present
- Winter Bird Highlights 2007, Is Brought to You by Project Feederwatch, a Joint Re- Tribution of Birds at Feeders Across North America
- Lake Andes NWR Complex Bird List
- Winter Population Trends of Six Species of Sparrows
- Partners in Flight Landbird Conservation Plan: 2016 Revision for Canada and Continental United States
- Passerine Assessment
- Old Mill State Park Bird Checklist
- Wildlife Viewing
- DEC 2018Newsletter.Pub
- Caprimulgiformes Apodiformes Coraciiformes
- Sparrow Identification Workshop Revised, 2011
- Town of Grafton Birds 2021
- Sp Su FW Sp Su FW Sp Su FW Snow Goose RR Bald Eagle CCCC
- Abundance and Habitat Associations of Birds Wintering in the Platte River
- Alpha Codes for 2168 Bird Species (And 113 Non-Species Taxa) in Accordance with the 62Nd AOU Supplement (2021), Sorted Alphabetically by English Name
- KNZ Bird Species List (A Standardized Set of Four Letter (AOU) Codes for Bird Names Are Used, Which Except Zimmerman's Code Were Used from 1981 to 2000)