Are there so many birds that cats don’t matter?
10,000 Birds
OCTOBER 16, 2012
Which brings us to the present post, in which we ask “How many birds are there?” In short, the answer is that in the United States there are 20 billion birds at the end of the breeding and fledging season, which gets winnowed down to 10 billion by the following early spring. Of course, a lot of the mammals would be hiding.
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