Collisions with wind turbines account for about one-tenth of a percent of all “unnatural” bird deaths in the United States each year. And of all bird deaths, 30 percent are due to natural causes, like baby birds falling from nests [source: AWEA]. So why the widespread misconception that labels wind turbines “bird-o-matics”? I­t all starts with California, raptors and the thousands of old turbines that make up the Altamont Pass wind farm.