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How many birds are killed by windmills and other green energy projects?

10,000 Birds

In other words, looking at fledglings (or older) and not chicks, the US bird population normally doubles itself every year, but then get undoubled by … well, various factors probably mostly hypothermia, starvation, disease, and predation. How many birds to cats kill in the United States?

Killing 274
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Feral Cats Are An Invasive Species in North America (and elsewhere)

10,000 Birds

The number of birds, and other animals, killed by feral Cats is probably large , but it either varies a great deal from place to place, or the estimates are so inaccurate that they, the estimates themselves, vary a great deal from place to place. We do know this: In areas where feral cat populations exist, they are often well established.