How does the location of wind farms influence avian and bat mortality?
At the Altamont Pass WRA, turbines within 500 feet of canyons (prey areas) were found to be associated with higher raptor mortality. Mortality is also higher at turbines at higher elevations (Orloff & Flannery 1992). Many of the negative impacts on birds and bats can thus be avoided by assessing usage and avoiding those areas where wildlife use is predicted to be highest (Cade 1995). Site evaluation should include habitat quality, bird abundance, bird use, prey base, migratory movements, and night use (PNAWPPM-II 1996).
