National Audubon Society Birds of North America: A Guide Review
10,000 Birds
JUNE 1, 2021
It does seem like the order is concurrent with the 61st Supplement, which came out in 2020, but Northwestern Crow is included as a full species. I am particularly happy to see that the bird communication section includes recent research on singing female birds. Plate 28 from Audubon Bird Guide, Eastern Land Birds, by Richard H.
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