It was in the late afternoon of the 28th of April, 1883, that I first witnessed this singing performance of the sandpiper. The bird rose from the _Rhododendron_ tundra on the northern slope of Kamennij Valley, and while flying about on quivering wings, sometimes remaining quite still in the air, it uttered a loud, agreeable, and melodious twitter, which really must be called a "song," whereupon, with outstretched wings, it descended obliquely, seating itself upon the top of a tussock. Sitting there, with puffed plumage and pendant wings, it produced a loud "bleating," so much like that of _Gallinago gallinago_ as to completely convince me that the analogous note of the latter is produced by the throat in exactly the same manner. During the "bleating" the whole bird was quivering with a tremulous motion as if in a high state of excitement. The voice was slightly more melodious than that of the snipe. _Nesting._--While wandering over the foothills of Kiska Island on June 17, 1911, I found my first nest of the Aleutian sandpiper. I was crossing a flat place, high up on a hill, covered with moss and scanty growth of grass, when the bird fluttered off almost underfoot, feigning lameness. The nest was a deep hollow in the moss, 3 inches in diameter and fully 2 inches deep, partially concealed by a few blades of scanty grass, and lined with dead leaves, a few straws, and a few feathers of the bird. The four eggs were only slightly incubated. I found a similar nest, containing three small, downy young, on Attu Island on June 23; the nest was on a little hummock on a hillside, a deep hollow, lined with dead leaves and bits of straw. It was the male bird that flew from the nest in both cases. Austin H. Clark (1910) found a nest on Attu Island on the side of a mountain, 700 feet or more above the valley and near an extensive patch of snow. Alfred M. Bailey (1925) found a nest at Emma Harbor, Siberia, on July 4, 1921, containing three young and an egg; the nest was "on the shores of the bay, in gravel along the beach." He also found several nests the following season near Wales, Alaska; "the nesting sites varied from exposed depressions in the moss to well-concealed dried grass." A set of eggs in Edward Arnold's collection, taken by Sheldon and Lamont on Montague Island, Alaska, June 22, 1916, came from a nest "on débris just above tidewater."