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Bufflehead Identification, All About Birds, Cornell Lab of …
Bufflehead - Wikipedia
Bufflehead | Audubon Field Guide
Bufflehead Overview, All About Birds, Cornell Lab of Ornithology
Bufflehead | Smithsonian's National Zoo and Conservation Biology Institute
Bufflehead Life History - All About Birds
Bufflehead - eBird
Bufflehead - ID, Facts, Diet, Habit & More - Birdzilla
Bufflehead | Diving Duck, Sea Duck, North American | Britannica
Bufflehead | Online Learning Center - Aquarium of the Pacific