Sudden air pressure changes around wind turbines is likely behind the large numbers of migratory bats found dead in southern Alberta, according to a new University of Calgary study. The two-year study found 90 per cent of the studied bats found dead below turbines near Pincher Creek suffered severe injuries to their respiratory systems consistent with a sudden drop in air pressure that occurs near the turbine blades.

Canadian researchers have found wind turbines can kill bats without them actually flying into the blades. ..."An atmospheric drop in pressure at wind-turbine blades is an undetectable - and potentially unforeseeable - hazard for bats, thus partially explaining the large number of bat fatalities at these specific structures," said Baerwald.

Researchers studying birds killed by power lines are encouraged by recent findings from a study in the Dakotas that could hold implications throughout the Central Flyway, the major migration route that stretches from Canada to Texas. Wildlife deaths from power lines, wind turbines and other structures are a growing concern across the country, said Al Manville, a senior wildlife biologist with the U.S. Fish and Wildlife Service. More transmission lines and wind turbines are planned in coming years, which could put several bird species at risk, Manville said. ...Research is important, partly because "birds play a key role in the ecosystem," said Greg Butcher, director of bird conservation at the National Audubon Society.

The Wildlife Society (TWS) today released their position statement on wind energy, "Impacts of Wind Energy Facilities on Wildlife and Wildlife Habitat." This position statement is based on TWS' award-winning technical review of the same name. ..."We have found that the magnitude of impacts from wind energy development on wildlife, particularly migratory birds and bats, is not articulated consistently to wildlife managers, decision makers or the public," stated Michael Hutchins, PhD, executive director of TWS. "This lack of consistency hinders progress toward developing energy solutions that do not adversely impact wildlife."

Science News Keywords: WIND ENERGY, NOCTURNAL, ENERGY INDUSTRY, ENVIRONMENT, CONSEQUENCES, SONGBIRDS, ECOSYSTEMS, MIGRATORY BIRD TREATY ACT -- Wind energy is one of the fastest growing sectors of the energy industry, but not without environmental consequences. Nocturnally active birds and bats have become prey to turbines, yet little guidance could be found for assessing impacts of wind energy on this group until now. A new article published in the latest issue of The Journal of Wildlife Management gives guidance about the methods and metrics of this subject.

Birds and bats have a powerful advocate in the new Congress. It's making people in the wind energy industry nervous. Representative Nick Rahall is chairman of the House Natural Resources Committee. Rahall is pushing legislation that would more strictly regulate wind energy to protect the birds and bats that are killed when they fly into wind turbines.

The wind-energy industry is objecting to federal legislation that seeks to protect birds and bats from wind turbines, arguing the measure would place unnecessary burdens on clean-energy projects. The Energy Policy Reform and Revitalization Act, a wide-ranging energy bill introduced this month, would create new standards for the placement and construction of turbines and mandate post-construction monitoring of their effects on wildlife.

Wind farms do kill animals in flight, but not always the obvious ones. Bats, not birds, appear to be the main victims of land-based wind turbines in the US, according to a report by the US National Research Council.

Ducks in the Dakotas, tanagers in Texas and grosbeaks along the Gulf of Mexico could all be hit by the rapid growth of wind power unless the renewable electricity farms are carefully sited, experts said. "The first three rules of avoiding impacts with wind turbines are always going to be location, location, location," Mike Daulton, a spokesman with the National Audubon Society, said in a telephone interview. Clean-energy wind farms are cropping up rapidly in the United States on rising concerns about greenhouse gas carbon dioxide emissions and flat output of natural gas, which fires most of the power plants built since the 1990s. U.S. wind power is expected to increase by 26 percent in installed generation this year, after similar growth last year. A study by the National Academy of Sciences released late this week found that wind energy could reduce the energy sector's carbon dioxide emissions by 4.5 percent by 2020. But federal and state governments should take environmental impacts of wind energy more seriously as part of the planning, locating and regulating turbines, it said.

WASHINGTON - An unusual coalition of conservationists and coal advocates told Congress on Tuesday that before the nation continues its rapid expansion of wind power, an assessment is needed of how many bats and birds are maimed and killed by wind turbines' blades. That study should be followed up with regulations to protect those species, witnesses told a House Natural Resources subcommittee.

In popular Halloween folklore, vampires are able to transform into bats. And, of course, fiction tells us that one way to kill a vampire, and thus the bat, is with a stake through the heart. But in areas around the United States, a new potential bat killer has emerged - wind turbines.

In addition to the threat of collision, wind generators can also pose a risk to migratory birds and bats, he said. Especially dangerous is wind farm turbine configurations that create a "barrier effect." Airborne animals are more likely to come into peril when trying to pass a wall of turbines, rather than a single turbine or small-scale operation.

Soaring on the wings of new wind-turbine technology, tax breaks, and rising fossil fuel costs, the US wind-power growth picture looks great - except to Edward Arnett, a wildlife biologist who sees a dead bat in it - many thousands of dead bats, actually.

The Interior Department's Fish and Wildlife Service thought it would be a breeze to get interested parties together earlier this month to work out some kinks in its guidelines on how to build wind turbines with minimal harm to bats and birds.

In the continuing dialog between Endless Energy Corp. and people interested in the proposed five turbine wind farm, Monday's meeting focused on ecological issues.

Sometimes it's not easy being green. Proponents say Michigan is ideal for wind generation, a Green Power energy source that is pollution free and self renewing. But some worry that spinning wind turbine blades up to 85-feet long could be lethal scythes for migrating birds, especially if, as some predict, wind generation gathers steam in Michigan.