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

10,000 Birds

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. So keep that in mind.

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

10,000 Birds

Also, feral Cats on islands seem to be a serious problem, causing the extirpation of some indigenous species. A hungry feral Cat in Minnesota goes and finds new prey in an area it previously had not explored, leaving the last few of one or another bird species alone for a while. We estimate that free-ranging domestic cats kill 1.4–3.7