It's the beginning of prime flying predator season. With the leaves thinning, the youngsters past fledging and fanning out away from the nest, you're more likely to catch a glimpse of a Cooper's or Red Tail swooping in and, as with most animals, the juveniles are much more tolerant of annoying photographers always pointing their cameras in every direction. If you're at a pond like the 1 at the Cook school, you might listen closely to the mallards if a raft (this is 1 of the words for a group of waterfowl on the water) is on the surface. There are a number of calls that signal different things to the bunch but a low collective murmur signals a predator in the area. If you don't see a fox, check the trees and your camera settings.