Often I see hawks and falcons use the roofs and cornices as cover from which to launch ambushes. Here I was staking out a kestrel nest in one particular cornice when a huge RTH came arcing around the brownstones, trying to flush pigeons from cover.
The female kestrel then spun around,
and took to the air.
She then flew in to the nest!
Its a tight fit!
Then it was the male's turn...
due to his smaller size, he fit in easily!