Atlantic puffin Medieval Latin "fratercula", friar, a reference to the black and white plumage which resembles monastic robes. The specific name "arctica" refers to the northerly distribution of the bird, being derived from the Greek ἄρκτος ("arktos"), the bear, referring to the northerly constellation, the Great Bear. 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 Manx shearwater ("Puffinus puffinus"), which in 1652 was known as the "Manks puffin". It is an Anglo-Norman word (Middle English "pophyn" or "poffin") used for the cured carcasses.
Christmas shearwater subalaris"). The Christmas shearwater is a slender-bodied shearwater, about 36 cm long, with a wingspan of around 75 cm, and weighs around 350 g. It has dark plumage all over, generally blackish-grey with a rusty-brown tinge, slightly paler on the underside of the bird, and with some small edging of white under the chin and pale fringes to the upperwing coverts. It has brown-grey feet and a dark bill and eyes. Both sexes are alike, as are the young after fledging. Nestlings are covered in dark grey down feathers. The species closely resembles the sooty ("Puffinus griseus") and short-tailed shearwaters