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A) Bill. 15. A) Bill. 16. Bones of the Bill. A) Bill. External Bill Covering. 18. Bill Diversity. Blue Grosbeak. Yellow-Rumped Warbler. Bullock’s Oriole. Blue-Throated Hummingbird. Bill Diversity. King Vulture. Peregrine Falcon. Bill Diversity. Long-Billed Curlew. American Avocet.
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A) Bill 15
A) Bill 16 Bones of the Bill
A) Bill External Bill Covering 18
Bill Diversity Blue Grosbeak Yellow-Rumped Warbler Bullock’s Oriole Blue-Throated Hummingbird
Bill Diversity King Vulture Peregrine Falcon
Bill Diversity Long-Billed Curlew American Avocet Roseate Spoonbill
Bill Diversity Black Skimmer
Bill Diversity White-Winged Crossbill Red Crossbill
Bill Diversity Whalebill
B) Head/Neck Regions White-Throated Sparrow
B) Head/Neck Regions Black-Chinned Sparrow Black-Throated Sparrow
B) Head/Neck Regions White-Crowned Sparrow Ruby-Crowned Kinglet
B) Head/Neck Regions Yellow-Bellied Sapsucker Red-Naped Sapsucker 5 3
B) Head/Neck Regions Brewer’s Sparrow Chipping Sparrow
B) Head/Neck Regions Eastern Meadowlark Western Meadowlark
B) Head/Neck Regions 14 Ears?
B) Head/Neck Regions External Ear Openings (and Auricular Feathers) Fig. 1-5 in Podulka et al. 2004
B) Head/Neck Regions 13 Visible Bird Eye
B) Head/Neck Regions Three Eyelids 12
B) Head/Neck Regions Fig. 1-6 in Podulka et al. 2004