Clangula hyemalis -- Long-tailed Duck; Oldsquaw, harelde kakawi, Pato cola larga. Alternate name on piece: Harelda glacialis [Long-tailed duck] Layout drawing, head of principal bird fairly finished; heavily and coarsely modified, apparently by Gould; second male in winter plumage in drawing, but summer on the published plate; a detail sketch and a monetary calculation in margin. Artist's name(s): Gould, John; Richter, Henry Constantine.