Downtown Cincinnati’s most famous falcons are back in their comfort zone.
A pair of peregrine falcons had been nesting on a windowsill outside the Mercantile Library for several years — until last year, when construction forced them to try and nest behind an air conditioning unit on a nearby building.
Peregrine falcons — who can reach speeds up to 200 miles an hour during dives and are among nature’s fastest animals — fought their way back from endangered status after almost going extinct in the 20th century. The use of the pesticide DDT and loss of habitat contributed to their steep decline…