Species: Aythya collaris
Ring-necked Duck
Species
Encyclopedia of Puget Sound
Classification
Kingdom
Animalia
Phylum
Craniata
Class
Aves
Order
Anseriformes
Family
Anatidae
Genus
Aythya
NatureServe
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
Ecology and Life History
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
Conservation Status
NatureServe Global Status Rank
G5
Global Status Last Reviewed
1996-11-21
Global Status Last Changed
1996-11-21
Other Status
LC - Least concern
Distribution
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)