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- Skull Identification Key for Central European Waterfowl
- The Troubled Baer's Pochard Aythya Baeri: Cause for a Little Optimism?
- Changes in the Sex Ratio of the Common Pochard Aythya Ferina in Europe and North Africa
- Order Anseriformes: from Check-List of Birds of the World
- Site Investigation Report
- Biodiversity Town of Pound Ridge, NY 2020
- Courtship of the Redhead (Aythya Americana) 1
- GROWTH, WEIGHTS, and PLUMAGES of the REDHEAD, AYTHYA Americahral
- ANSERIFORMES Taxon Advisory Group Regional Collection Plan 3Rd Edition • 2020 - 2025
- Aythya Affinis) in Subarctic Taiga David Lee Trauger Iowa State University
- Of the Anseriformes (Aves: Charadriomorphae)
- Birds List for Carlsbad Caverns Np
- Ring-Necked Duck Aythya Collaris
- Behavioral Isolating Mechanisms in the Family Anatidae
- Eye Color of Female Lesser Scaup in Relation to Age
- Lesser Scaup Aythya Affinis
- A Phylogenetic Analysis of Recent Anseriform Genera Using Morphological Characters
- Redhead in Nottinghamshire: New to Britain and Ireland M
- Aythya Americana) Brett A
- ASSESSING HABITAT SUITABILITY for the COMMON POCHARD, Aythya Ferina (ANSERIFORMES, ANATIDAE) at DIFFERENT SPATIAL SCALES in OREL’ RIVER VALLEY, UKRAINE
- Ring-Necked Duck Aythya Collaris
- Redhead Aythya Americana Hundreds of Redheads Winter in Mission Bay
- Canvasback Aythya Valisineria
- Actinopterygii Class: Amphibia Class: Arachnida Class: Insecta
- Identification Challenge: Lesser Vs. Greater Scaup by Pierre Deviche, Phoenix, Az 85048, [email protected]
- Greater Scaup Aythya Marila in San Diego County, Near the Southern Tip of Its Winter Range, the Greater Scaup Is Uncommon to Rare
- Bay Ducks Guild
- Diving Behaviour and Heart Rate in Tufted Ducks (Aythya Fuligula)
- Foods of New Zealand Dabchick (Poliocephalus Rufopectus)
- Salt Gland Development in Migratory Redheads (Aythya Americana) in Saline Environments on the Winter Range, Gulf of Mexico, Usa
- Greater Scaup Aythya Marila
- Eligible Species for the Junior Duck Stamp Contest Restrictions on Subject Matter of Entry: Please Submit an Entry Featuring One of the Species Listed Below
- Eligible Species
- Special Animals List
- 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)
- MALABAR PERIOD FAUNAL USE at TWO LOCATIONS in the FOX LAKE SANCTUARY, BREVARD COUNTY, FLORIDA by VIRGINIA L LUCAS STEPHEN R. M