On the north tower of the El Dorado Apartments (300 Central Park West), there is an air conditioner in the left/right center of the tower about a quarter of the way down.  The Peregrine Falcon which likes to hang out by the reservoir, uses this AC unit as picnic table.  In the photographs, you can see the remains of a Rock Pigeon.  So, if you’re looking for the Peregrine Falcon and don’t see it in the trees by the Gothic Bridge, take a look up at the El Dorado.