Hawk nesting season began on Wednesday evening in Manhattan, with reports from three nesting sites that the female red-tailed hawks were spending their first overnights in their nests. This usually precedes egg-laying by a day or two. The three nests in question were the new Riverside Park nest at 116th St (aka, Morningside West, shown above), Inwood Hill Park, and the Central Park Fifth Ave. nest.
But it seems one nest was running ahead of that schedule, as word came Thursday afternoon that the hawks at J. Hood Wright Park (uptown near the George Washington Bridge) had been spotted doing a switch-off on their nest. That means there's at least one egg in the nest, so when the female needs a break from egg-tending duty, she switches off with the male on keeping the clutch covered.
So look for first Manhattan red-tail hatch come about April 10.