Breeding Cat Population Killing Rodents 
10,000 Birds
SEPTEMBER 16, 2014
However, in this post, I’d like to lay out the basic numbers as we pretend to know them about overall bird mortality, human related causes of mortality, and somewhere in there I’ll note that the number of birds that are killed by windmills is so small that it says “zero” on my pie chart.
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. Hardly any Sandhill Cranes are killed by domestic (including ferrel domestic) cats. Raptors either. But this is problematic.
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