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Allen's Hummingbird boom missed by breeding bird surveys


PhysOrg
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Allen's Hummingbird has been placed on several conservation watchlists, as breeding bird surveys indicating population declines have spurred concerns that climate change may push it out of Southern California. However, local birdwatchers have reported at the same time that the non-migratory subspecies of Allen's Hummingbird, once restricted to the Channel Islands, is now a common sight at feeders in Riverside and Los Angeles. Why the discrepancy? A new commentary published in The Condor: Ornithological Applications may provide answers.

 

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