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Female plumage polymorphism is rare in hummingbirds
The North American Banders Manual for Banding Hummingbirds
Manuals – NABC
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Frontiers Geographic and Temporal Variation in Annual Survival of a Declining Neotropical Migrant Hummingbird (Selasphorus rufus) Under Varying Fire, Snowpack, and Climatic Conditions
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Do Hummingbirds Hum, PDF, Pollinators
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Quantifying phenology and migratory behaviours of hummingbirds using single-site dynamics and mark-detection analyses. - Abstract - Europe PMC
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