During the summer months I have had the occasional opportunity to observe and photograph a family of Peregrine Falcons made up of two adults and three fledglings. Approximately two weeks after they fledged, I've observed an interesting behavior of all three juveniles. They would fly towards a tree top with talons stretched, tear off leaves from the tree and then discard the leaves a little later. This behavior continued for a week and then stopped altogether. Here's a sequence of shots of one of the juveniles practicing hunting skills while in flight.