Species: Aythya marila

Greater Scaup
Species
    Kingdom
    Animalia
    Phylum
    Craniata
    Class

    Aves

    Order

    Anseriformes

    Family

    Anatidae

    Genus

    Aythya

    Classification
    Other Global Common Names
    Pato Boludo-Mayor - fuligule milouinan
    Informal Taxonomy
    <p>Animals, Vertebrates - Birds - Waterfowl</p>
    Formal Taxonomy
    Animalia - Craniata - Aves - Anseriformes - Anatidae - Aythya
    Migration
    <p>false - false - true - Migrates northward in spring, usually arriving on breeding grounds in April-May (late May-early June in far north). Departs far north by end of September, southward migration through U.S. occurs mostly in October-November (Terres 1980). Scaup that breed in northern Alaska, northern Yukon, and Mackenzie Delta winter on the Atlantic and Gulf coasts of the southeastern U.S. (Johnson and Herter 1989). See Johnson and Herter 1989 for information on early summer molt migration in northern Alaska and northwestern Canada.</p>
    Non-migrant
    false
    Locally Migrant
    false
    Food Comments
    Feeds on aquatic plants and animals. Coastally mollusks (clams, scallops, mussels, etc.) comprise a significant portion of the diet. In other areas eats seeds, leaves, stems of plants (sedges, pondweeds, muskgrass, wild celery, etc.).
    Reproduction Comments
    Clutch size averages about 8-9. Incubation: 23-27 days, by female. Males usually abandon females in early incubation. Young are tended by female, fledge in 9-10 weeks. May nest in colonies of 50+ pairs.
    Ecology Comments
    May gather in winter flocks of up to 50,000 individuals.
    Length
    46
    Weight
    957
    NatureServe Global Status Rank
    G5
    Global Status Last Reviewed
    1996-11-21
    Global Status Last Changed
    1996-11-21
    Other Status

    <p>LC - Least concern</p>

    Conservation Status Map
    <img src="http://www.natureserve.org/explorer/servlet/GetMapGif?CA.AB=__&CA.BC=__&CA.LB=S5&CA.MB=S5&CA.NB=S1&CA.NF=S4&CA.NT=S5&CA.NS=__&CA.NU=SNR&CA.ON=S4&CA.PE=__&CA.QC=S4&CA.SK=__&CA.YT=S4&US.AL=__&US.AK=S5&US.AZ=__&US.AR=__&US.CA=__&US.CO=__&US.CT=__&US.DE=__&US.DC=__&US.FL=__&US.GA=S4&US.ID=__&US.IL=__&US.IN=__&US.IA=__&US.KS=__&US.KY=__&US.LA=__&US.ME=__&US.MD=__&US.MA=__&US.MI=__&US.MN=__&US.MS=__&US.MO=__&US.MT=__&US.NE=__&US.NV=__&US.NH=__&US.NJ=__&US.NM=__&US.NY=__&US.NC=__&US.ND=__&US.OH=__&US.OR=S4&US.PA=__&US.RI=__&US.SC=__&US.SD=__&US.TN=__&US.TX=__&US.UT=__&US.VT=__&US.VA=__&US.WA=__&US.WV=__&US.WI=__&US.WY=__" alt="Conservation Status Map" style="width: 475px; height: auto;" />
    Global Range
    H - >2,500,000 square km (greater than 1,000,000 square miles) - H - Holarctic. BREEDS: in Northern America, northern Alaska east across Canada to Hudson Bay, central Quebec, and New Brunswick (McAlpine et al. 1988), south to northwestern British Columbia, southeastern Michigan. WINTERS: southeastern Alaska south to Baja California; from eastern Great Lakes area and Canadian Maritime Provinces to southern Florida and Gulf Coast; casual in Hawaii. Primary wintering areas include the coastal Pacific Northwest, southern and eastern Great Lakes, and Atlantic coast centering around Long Island Sound (Root 1988).
    Global Range Code
    H
    Global Range Description
    >2,500,000 square km (greater than 1,000,000 square miles)
    ELEMENT_GLOBAL.2.102413