The Effect of Wind Turbines on Birds

Wind turbines are often seen as environmentally friendly because of their cheap, renewable energy output; however, some caution that wind turbines may also have negative ecological effects, including harming birds. When examining the impact of turbines on birds, there are several factors to consider.

  1. Injury and Death

    • The spinning blades of a wind turbine have been known to strike down and kill birds in mid-flight. According to the American Bird Conservatory, the number of birds killed by a single turbine per year ranges from less than 1 to 7.5.

    Migration

    • The American Bird Conservatory explains that migratory birds are at the greatest risk of turbine-related death. Over time, increased migration fatalities may cause birds to change migratory patterns, thereby altering local ecosystems.

    Mating

    • Some contend that wind turbines can disrupt bird-mating patterns and habits, but more research is needed to determine if this claim is true.

    Habitat

    • Multiturbine wind farms require large, flat parcels of land with little wind resistance. To remove wind resistance, trees are clear cut from the area; this displaces local wildlife, including tree-dwelling birds.

    Positive Impact

    • Wind turbines reduce fossil-fuel dependence. Advocates for wind energy point out that acid rain from fossil fuels actually harm more birds than wind turbines.