Much smaller than the preceding; but 7.5 in. in length. Breast gray, belly white; a small tuft of recurved feathers on the forehead and slender white plumes from base of bill over the eye and from under the eye, backwards. The bill in summer is a bright vermillion color. On some of the islands of the Aleutian chain they breed quite abundantly. The nests are placed back in the crevices of the rocks, where the single white eggs are laid. Size 2.00 × 1.25. [Illustration 027: Paroquet Auklet. Crested Auklet.] [Illustration: White.] [Illustration: right hand margin.] Page 26 20. LEAST AUKLET. _Aethia pusilla._ Range.--North Pacific on the islands and coast of Alaska. This is the smallest of the Auklets; length 6.5 in. This species has no crest, but has the slender white plumes extending back from the eye. The entire under parts are white sparsely spotted with dusky. This species is by far the most abundant of the water birds of the extreme Northwest, and thousands of them, accompanied by the two preceding species, nest on the rocky cliffs of the islands of Bering Sea. Their nesting habits are the same as those of the other Auklets, they placing their single white egg on the bare rocks, in crevices on the cliffs. Size 1.55 × 1.10. Data.--Pribilof Is., Alaska, June 8, 1897. Single egg laid in crevice. Thousands breeding on the island. 21. ANCIENT MURRELET. _Synthliboramphus antiquus._ Range.--Pacific Coast, breeding from the border of the United States, northward, and wintering south to southern California. The Murrelets have no crests or plumes and the bills are more slender than the Auklets and are not highly colored. The ancient Murrelet or Black-throated Murrelet, as it is also called, has a gray back, white under parts and a black head and throat, with a broad white stripe back of the eye and another formed by the white on the breast extending up on the side of the neck. They breed abundantly on the islands in Bering Sea, laying one or two eggs at the end of burrows in the banks or on the ground, and in some localities in crevices on the cliffs. The eggs are a buffy white color and are faintly marked with light brown, some of these being in the shape of spots and others lengthened. Size 2.40 × 1.40. Data.--Sanak Islands, July 1, 1894. Two eggs on the ground under a tuft of grass and in a slight excavation lined with fine grass. [Illustration: Least Auklet. Ancient Murrelet. Marbled Murrelet.] [Illustration: White.] [Illustration: Buff.] [Illustration: left hand margin.] Page 27 23. MARBLED MURRELET. _Brachyramphus marmoratus._ Range.--North Pacific Coast, breeding from Vancouver Island. South in winter to southern California.