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Clive Hambler, an Oxford zoologist, has an article on the wind turbine toll on birds and bats.

www.spectator.co.uk/features/8807761/wind-farms-vs-wildlife/...
Every year in Spain alone — according to research by the conservation group SEO/Birdlife — between 6 and 18 million birds and bats are killed by wind farms. They kill roughly twice as many bats as birds. This breaks down as approximately 110–330 birds per turbine per year and 200–670 bats per year. And these figures may be conservative if you compare them to statistics published in December 2002 by the California Energy Commission: ‘In a summary of avian impacts at wind turbines by Benner et al (1993) bird deaths per turbine per year were as high as 309 in Germany and 895 in Sweden.’

Because wind farms tend to be built on uplands, where there are good thermals, they kill a disproportionate number of raptors. In Australia, the Tasmanian wedge-tailed eagle is threatened with global extinction by wind farms. In north America, wind farms are killing tens of thousands of raptors including golden eagles and America’s national bird, the bald eagle. In Spain, the Egyptian vulture is threatened, as too is the Griffon vulture — 400 of which were killed in one year at Navarra alone....

My colleague Mark Duchamp suggests birds are lured in because they see the turbines as perching sites and also because wind towers (because of the grass variations underneath) seem to attract more prey. The turbines also attract bats, whose wholesale destruction poses an ever more serious conservation concern....

A recent study in Germany by the Leibniz Institute for Zoo and Wildlife Research showed that bats killed by German turbines may have come from places 1,000 or more miles away. This would suggest that German turbines — which an earlier study claims kill more than 200,000 bats a year — may be depressing populations across the entire northeastern portion of Europe. Some studies in the US have put the death toll as high as 70 bats per installed megawatt per year: with 40,000 MW of turbines currently installed in the US and Canada. This would give an annual death toll of up to three million.

DB2
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