Species: Aythya collaris

Ring-necked Duck
Species
    Kingdom
    Animalia
    Phylum
    Craniata
    Class

    Aves

    Order

    Anseriformes

    Family

    Anatidae

    Genus

    Aythya

    Classification
    Other Global Common Names
    Pato Pico Anillado - fuligule à collier
    Informal Taxonomy
    Animals, Vertebrates - Birds - Waterfowl
    Formal Taxonomy
    Animalia - Craniata - Aves - Anseriformes - Anatidae - Aythya
    Migration
    false - false - true - Migrates northward in March-April, southward usually mid-September to late November (Terres 1980). Arrives in Costa Rica in late October or November, departs January-March, depending on water levels.
    Non-migrant
    false
    Locally Migrant
    false
    Food Comments
    Plant material important: tubers, leaves, rootstocks, and seeds of aquatic plants (pondweeds, algae, sedges, grasses, smartweeds, etc.). Also eats aquatic invertebrates, espec. in summer. Downy young: insects, snails, sponges, etc.; also seeds and other plant material.
    Reproduction Comments
    Clutch size is 6-14 (usually 8-10). Incubation, by female, lasts 25-29 days (Terres 1980). Young are tended by female, can fly about 49 days after hatching.
    Ecology Comments
    Usually widely dispersed in winter, but concentrations of several thousand not uncommon (Terres 1980). Usually in flocks (Stiles and Skutch 1989). In Maine, daily survival rate of duckling was reduced in low-pH wetlands (Mcauley and Longcore, 1988, J. Wildl. Manage. 52:169-176).
    Length
    43
    Weight
    730
    NatureServe Global Status Rank
    G5
    Global Status Last Reviewed
    1996-11-21
    Global Status Last Changed
    1996-11-21
    Other Status

    LC - Least concern

    Conservation Status Map
    <img src="http://www.natureserve.org/explorer/servlet/GetMapGif?CA.AB=S5&CA.BC=S5&CA.LB=S5&CA.MB=S5&CA.NB=S5&CA.NF=S5&CA.NT=S4&CA.NS=S5&CA.ON=S5&CA.PE=S5&CA.QC=S5&CA.SK=S5&CA.YT=S5&US.AL=__&US.AK=S3&US.AZ=S5&US.AR=__&US.CA=SNR&US.CO=S4&US.CT=__&US.DE=__&US.DC=__&US.FL=__&US.GA=S4&US.ID=S3&US.IL=__&US.IN=SH&US.IA=__&US.KS=__&US.KY=__&US.LA=__&US.ME=S5&US.MD=__&US.MA=SX&US.MI=S4&US.MN=SNR&US.MS=__&US.MO=__&US.MT=S5&US.NN=__&US.NE=SU&US.NV=S2&US.NH=S3&US.NJ=__&US.NM=S1&US.NY=S3&US.NC=__&US.ND=SNR&US.OH=__&US.OK=__&US.OR=S3&US.PA=__&US.RI=__&US.SC=__&US.SD=S4&US.TN=__&US.TX=__&US.UT=__&US.VT=__&US.VA=__&US.WA=S4&US.WV=__&US.WI=S4&US.WY=S4" 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 - BREEDS: southeastern and east-central Alaska, central British Columbia eastward through northern Saskatchewan to Newfoundland, south to northeastern California, southeastern Arizona, southern Colorado, Iowa, Illinois, Pennsylvania (formerly), northern New York, Massachusetts. WINTERS: southeastern Alaska, southwestern U.S., southern Illinois, and Massachusetts south through Mexico to Panama, Grenada, West Indies; rarely Hawaii. (AOU 1983). In the U.S., the highest winter densities occur in eastern New Mexico (Bitter Lake refuge), the Mississippi River in Mississippi, Lake Isom and Reelfoot refuges (Missouri-Tennessee), the Florida panhandle (St. Marks refuge), eastern Texas panhandle, and southern San Joaquin Valley in California (Root 1988).
    Global Range Code
    H
    Global Range Description
    >2,500,000 square km (greater than 1,000,000 square miles)
    ELEMENT_GLOBAL.2.100619