Re: Wildcat Canyon raptors, Sunday afternoon


David Brostoff
 

On Oct 4, 2015, at 9:23 PM, Ryan Holmes lexagon77@... [EBB_Sightings] <EBB_Sightings-noreply@...> wrote:

Two hours in the park yielded some swell sightings, including . . . a close adult Cooper's Hawk harried by several hummingbirds. . . .
Coincidentally, yesterday I read the following with great interest:

“Professor Remsen pointed out that sharp-shinned hawks, which pose a very real threat to hummingbirds, are so similar in appearance to Cooper’s hawks, which are generally too large to prey on hummingbirds, that even experienced birders can have a difficult time separating them. Yet, the female hummingbirds easily distinguish these two species and somehow ‘know’ which one poses no threat to their tiny families.”

“Love thy enemy's enemy: why hummingbirds nest near hawks”
<http://www.theguardian.com/science/grrlscientist/2015/sep/30/hummingbirds-nest-near-hawks-for-protection?CMP=share_btn_tw>

David

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