I had a sound recorder in my hand when the bird flew over. The hawk’s whistled cry is a quintessential sound of the summer forest. Think: sweat and lush green humidity. The birds are secretive during breeding and so are more often heard than seen. They are much more conspicuous when they migrate in the spring and fall, circling high as they soar to Central and South America .

The recording is quiet, but the two-part whistle is evident. A chickadee calls at the end: