No form of electrical generation is entirely without unwanted impacts upon plants, animals, and the natural environment. Even the most environmentally appealing options (like solar, wind, and tidal power) have drawbacks. While they are minimal in comparison to the dire consequences of coal, natural gas, or nuclear power, they are real and ought to be acknowledged.
One unfortunate consequence of using wind turbines has recently come to light: the pressure drop near the blades kills bats. This is because the air inside the lungs expands in a low-pressure environment, causing the capillaries surrounding the air chambers to burst.
In the grand scheme of things, bat and bird fatalities produced by strikes and near-strikes on wind turbines are probably not a massive ecological cost. Nonetheless, they demonstrate how challenging it is to operate an industrial, technological society in a manner that is at least somewhat environmentally benign.