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A Strategic Arms Race Among Birds

10,000 Birds

The vast majority of the 10,000+ living species of birds are passerines, and the vast majority of those have a similar system of breeding: Mom and dad bird make a nest and share parental responsibilities roughly equally, if not identically. In the latter, three or more adult individuals contribute to the raising of offspring.

Breeders 204
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The Crossley ID Guide: Britain & Ireland — A Review of the Book

10,000 Birds

I knew I would not be seeing the bird in its rosy-breasted breeding plumage, but somehow seeing the bird in all its forms helped crystallize its appearance in my head. I find the Crossley Guides, Eastern Birds and Raptors (fall 2013), very useful when I’m looking for new or unfamiliar birds (Linnet!), I studied it.

Ireland 172