I took a visit to three of the Manhattan nests on Sunday and found them all with brooding mothers. (The fourth nest I know about in Manhattan is located at 888 Seventh Avenue, and its location, makes it difficult to determine if the mother is brooding yet.)
Inwood Hill Park
St. John the Divine
Fifth Avenue
It was a great day seeing three pairs of Red-tailed Hawks thrive in Manhattan, each in their own way.