Counting Bird Feathers
How many feathers does a ruby-throated hummingbird have?
According to the Audubon Encyclopedia of Birds (Terres), the lowest
number of feathers counted on a single bird was 940, on a
ruby-throated hummingbird in June, (Wetmore, 1936). That is a lower
number than any other feather count reported, even for similarly small
species, next closes was 1119 on a kinglet, also by Wetmore.
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Update: June 2012