Wind turbines kill far fewer birds than fossil fuel power plants
The question of whether wind turbines kill more birds than fossil fuel power plants has a clear answer in the numbers. A peer reviewed study, meaning other scientists checked the work before it was published, measured 0.3 bird deaths for every gigawatt hour of electricity that wind turbines generate in the United States. A gigawatt hour is a standard unit for how much electricity a power plant actually produces, not how large the plant is built to be. Fossil fuelled power stations, plants that burn coal, oil or natural gas, killed 5.2 birds per gigawatt hour, about 17 times the wind figure. Nuclear power stations killed 0.4 birds per gigawatt hour, also far below fossil fuel plants.
Figures come from a 2009 study built on 2006 operating data, the most recent peer reviewed comparison of all 3 power sources on this measure.
Show the numbers
| Wind | 0.3 |
| Nuclear | 0.4 |
| Fossil fuel | 5.2 |
Climate change, not blade strikes, drives the fossil fuel number
The 5.2 figure is not 1 cause but 5 added together, and the study breaks each one out separately in its own data table. Bird collisions with plant equipment and smokestacks account for only 0.07 deaths per gigawatt hour. Coal mining and the habitat loss it causes account for 0.02. Acid rain destroying nesting habitat accounts for 0.05, and mercury pollution accounts for 0.06. The largest single piece, 4.98 deaths per gigawatt hour, comes from climate change altering the migration routes and habitat that birds depend on. That single cause is 96% of the entire fossil fuel total. It means the familiar image of a bird striking a smokestack accounts for a small fraction of the harm, not the largest part of it.
The 5 causes add to 5.18 deaths per gigawatt hour, the fossil fuel total shown in the chart above. Climate change alone is 96% of that total.
Show the numbers
| Climate change altering habitat | 4.98 |
| Bird collisions with equipment | 0.07 |
| Mercury pollution | 0.06 |
| Acid rain habitat loss | 0.05 |
| Coal mining habitat loss | 0.02 |
The toll from wind turbines has grown with the fleet
The 0.3 figure rests on 2006 operating data from 339 turbines, a much smaller fleet than exists today. The American Bird Conservancy, the wildlife group that runs a wind and wildlife campaign, cites newer peer reviewed studies built on turbine counts from around 2012 that put the annual bird toll from wind turbines at 239,000 to 573,000 birds a year nationally. Installed wind capacity grew roughly tenfold between 2006 and 2012, so a bigger fleet killing more birds in total is consistent with a fixed rate per gigawatt hour, not proof that the rate itself changed. Alex Banks, an ornithologist, a scientist who studies birds, at Natural England, explains why birds do not treat a turbine as a hazard to avoid.
Their evolution, I suppose, hasn't primed them necessarily to expect obstacles in their foraging space.
Alex Banks, an ornithologist, a scientist who studies birds, at Natural England. Source 3.
Fossil fuel plants still generate far more power than wind
United States power plants generated about 4,429 billion kilowatt hours of electricity in 2025, according to the federal Energy Information Administration. Natural gas supplied 40% of that and coal supplied 17%, while wind supplied 11%. Combined, natural gas and coal plants generated roughly 5.2 times as much electricity as wind turbines that year, a calculation MAOWCE made from those percentage figures and separate from the 17 times mortality gap named above. That larger scale of generation, not the per gigawatt hour rate alone, is why fossil fuel plants account for so many more bird deaths in total.