Life Histories of North American Diving Birds: Order Pygopodes, Números 107-108

abundant adult winter plumage Alaska Aleutian Islands ancient murrelet appear April Arctic August Bering Sea bill Bird Rock black guillemot breeding grounds breeding season brown burrows California murre Cape cliffs coast Commander Islands crested auklet crevices diving dovekie downy young dusky eared grebe early eggs showing Farallone feathers feeding feet fish flight flocks flying four extremes measure Greenland gulls hatched head and neck horned grebe inches incubation July June Labrador Lake large numbers least auklets ledges marbled murrelet migration millimeters National Museum northern notes nuptial plumage October old birds ovate Pacific pairs Pallas's murres paroquet auklet pied-billed grebe pond postnuptial molt prenuptial molt Pribilof Islands probably razor-billed records red-throated loon River rocky says seen September shore side Sound southern species specimens spots spring summer surface swimming taken throat tufted puffin United States National usually western grebe wings Xantus's murrelet young birds