10,000 Birds
SEPTEMBER 16, 2014
According to the US Fish and Wildlife Service , there are about 10 billion breeding birds in the US. The maximum population size may be closer to 20 billion in the fall, and 10 billion at the start of the Spring breeding season. Clearly the second choice will cause some species to go extinct, most likely.
10,000 Birds
OCTOBER 16, 2012
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. adding wolves, who displace coyotes) can dramatically change the ecology and directly affect species diversity and abundance.
10,000 Birds
SEPTEMBER 17, 2013
… Matthew Anderson [of Audubon] said proponents of colonies are putting the interests of one invasive species — cats — over the hundreds of other native ones that are their prey. Cats are domesticated animals that are not indigenous wildlife in North America. Those who violate the ordinance can be fined $200.
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