«On the largest turbines, researchers continue to use an undersized 75 -
meter search radius, even though the much larger turbines are known to catapult birds and bats much further from turbine towers.
While the smaller 75 -
meter search area is generally fine for the 50 - 100 kW turbines, since some 85 % of all fatalities are found within that
search radius, the
search radius must be much wider (200 - 250
meters) for the 2.5 - MW turbines, to achieve valid results.»