TEST Costa Rica Groups Mexico 
10,000 Birds
JULY 4, 2017
Raptors of Mexico and Central America by William S. This is the first identification guide that I know of that covers Mexico (technically North America but rarely included in North American raptor guides) and Central America. Interestingly, Raptors of Mexico and Central America does not cover vocalization. Clark and N.
10,000 Birds
DECEMBER 4, 2018
Even more than warbler, shorebird, and sparrow identification, this is a field that tests our endurance (gull watching is too often done in bitter cold, windy conditions), patience (even getting one good photo can take hours as you try to separate the ‘interesting gull’ from the flock), observational skills (so many plumages!) Range Maps.
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