.Umbagog. Clangula americana. 1890. Oct.25. Two adults ♂♂ and two ♀♀ in Erroll Hill pond, one of the drakes apparently in perfect plumage, the other with head brownish. The ♀♀ came close in shore & made short dives. One called krück Scaup Duck. very like a Snipe. They dove rather splashily like a musk rat. The drakes kept out of shot, off shore. One dove most of the time for an hour, the other buried head amongst scapulars and slept for 15 to 20 minutes at a time floating in one place turning around in one place at rate of about one turn per minute. I think the light air acted on his tail which was slightly raised. Twice one of the drakes rose on end & flapped his wings a few times each stroke producing the humming top sound as loudly & distinctly as if the bird were flying. One of the ♀♀ also flapped her wings in a similar manner but made only a slight rustling noise. Is not the humming top sound made only by the adult males? I can think believing of several reasons for thinking it to be so. It would explain why we hear it here so seldom & on the seacoast in winter so often.