I finally put up my hummingbird feeder. After learning about nectar feeders from Audubon, I watched Hummingbirds: Magic in the Air at PBS online. What impressed me the most about the documentary was the part about the courtship display of Anna's hummingbird, a hummingbird that visits my feeder daily. The male of the species makes a dives and then at just the point when he comes out of the dive, his wings make a high pitch sound.
Diana Carol Clarke