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. There are several species, such as California Condor, for which new material had to be written (California Condor is called “nearly extinct” in the older title and not included).
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