The low air pressure killing bats thing is also explained in more depth here.Curiously enough, they say, “A large portion of the kills occur at the lowest wind speeds,” which maybe conflicts with the assertion of the article above.
They also say scientists don't know what attracts the bats, but scientists are spending millions to try to find out.
I don't know if this is connected but, wind farms create radar blackout zones. They're creating problems for national security in Britain.
http://business.timesonline.co.uk/tol/b ... 355764.eceIt isn't just bats either.

And it isn't just a few of animals.
Wind farms decimate bird, and bat populations.Some other problems with wind energy*
BANANA - build-nothing-anywhere-near-anyone. That leads to this...
$1:
Although people tend not to live in windy areas, BANANA can complicate another necessity for wind farms (as it can for most sources of electricity): transmission. Given the gigantic distances in America especially, remote generators require miles of nuts-and-bolts infrastructure to get the power to population centres.
In California eco-protesters, have delayed, or halted completion of new transmission lines.
* Going by Denmark's example,
There's no evidence wind power actually cuts carbon emissions.*
It's real expensive. In Britain...
$1:
The Government has now accepted that the total costs of meeting the 2020 target will be £100 billion. This is the equivalent of £4,000 for every household in the country.
*
In Texas it got so expensive people stopped buying it.*
There's a history of brown-outs.