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"Simorhynchus pusillus. Least Auk. Knob-nosed Auk. Bill small and simple, but stout for its length, scarcely higher than wide at base, rather obtuse at tip. A small knob or tubercle at the base of the culmen, which is deciduous. No crest; but front, and sides of head more or less thickly lined with delicate white thready feathers; a similar series, exceedingly fine, from the eye along sides of hind head and nape. Excepting these filaments, the entire upper parts glossy black; region about under mandible, and a few feathers along the sides of body and flanks, blackish; under parts white, more or less extensively mottles or clouded with blackish. Lining of wings white, with dark feathers along edge. Bill red, the know and base of upper mandible dark. Legs (dry) undefinably dark, the front of tarsus and tops of toes lighter." Elliot Coues, 1884

Least Auks

"Simorhynchus pusillus. Least Auk. Knob-nosed Auk. Bill small and simple, but stout for its length,…