The tufted puffin (Fratercula cirrhata), also known as crested puffin, is a relatively abundant medium-sized pelagic seabird in the auk family (Alcidae) found throughout the North Pacific Ocean. It is one of three species of puffin that make up the genus Fratercula and is easily recognizable by its thick red bill and yellow tufts. Description Tufted puffins are around in length with a similar wingspan and weigh about three-quarters of a kilogram (1.6 lbs), making them the largest of all the puffins. Birds from the western Pacific population are somewhat larger than those from the eastern Pacific, and male birds tend to be slightly larger than females. They are primarily black with a white facial patch, and, typical of other puffin species, feature a very thick bill, primarily red with some yellow and occasionally green markings. Their most distinctive feature and namesake are the yellow tufts () that appear annually on birds of both sexes as the summer reproductive season approaches. Their feet become bright red and their face is also bright white in the summer. During the feeding season, the tufts molt off and the plumage, beak, and legs lose much of their luster. As among other alcids, the wings are relatively short, adapted for diving, underwater swimming, and capturing prey rather than gliding, of which they are incapable. As a consequence, they have thick, dark myoglobin-rich breast muscles adapted for a fast and aerobically strenuous wing-beat cadence, which they can nonetheless maintain for long periods of time. Juvenile tufted puffins resemble winter adults, but with a grey-brown breast shading to white on the belly, and a shallow, yellowish-brown bill. Overall, they resemble a horn-less and unmarked rhinoceros auklet (Cerorhinca monocerata). Taxonomy The tufted puffin was first described in 1769 by German zoologist Peter Simon Pallas. The scientific name Fratercula comes from the Medieval Latin , friar, a reference to the black and white plumage which resembles monastic robes. The specific name cirrhata is Latin for "curly-headed", from cirrus, a curl of hair. The vernacular name puffin – puffed in the sense of swollen – was originally applied to the fatty, salted meat of young birds of the unrelated species, the Manx shearwater (Puffinus puffinus), formerly known as the "Manks puffin". It is an Anglo-Norman word (Middle English pophyn or poffin) used for the cured carcasses. The Atlantic puffin acquired the name at a much later stage, possibly because