[Eala]

Since the phalanx of giant windmills began churning in the air [...] an estimated 22,000 birds have died, including hundreds of golden eagles, red-tailed hawks, kestrels and other raptors,

Let's see, that's 22000 birds total, and since they only say "hundreds" I'll be generous and say 1000 raptors, killed by 7000 windmills over two decades. Let's run the numbers:

22000 / 20 = 1100 birds per year.
1000 / 20 = 50 raptors per year.

1100 / 365.25 = 3.01 birds per day.
50 / 365.25 = 0.136 raptors per day (1/0.136 = 7.3 days / raptor, or one raptor per week)

3.01 / 7000 = 0.0043 birds per day per windmill (1/0.043 = it takes 2326 windmills to kill one bird per day)
0.136 / 7000 = 1.94e-5 raptors per day per windmill (1/1.94e-5 = it takes 51471 windmills to kill one raptor a day)

[biblewonk]

Good math. That happens to be the numbers for the worst location for bird kill of a all wind farms. Modern wind farms produce the same power with about 1/25 as many windmills. They are much more carefull about not sighting them in the most densely populated raptor breeding ground in the world too.