Aythya affinis


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Related to Aythya affinis: lesser scaup duck, scaup duck
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Noun1.Aythya affinis - common scaup of North AmericaAythya affinis - common scaup of North America; males have purplish heads
bluebill, scaup, scaup duck, broadbill - diving ducks of North America having a bluish-grey bill
References in periodicals archive ?
Species Number Percent Surf Scoter 18 24.7 (Melanitta perspicillata) Long-tailed Duck 14 19.2 (Clangula hyemalis) White-winged Scoter 13 17.8 (Melanitta fusca) Greater Scaup 13 17.8 (Aythya marila) Black Scoter 8 10.1 (Melanitta nigra) Lesser Scaup 2 2.7 (Aythya affinis) Hooded Merganser 2 2.7 (Lophodytes cucullatus) Bufflehead 1 1.4 (Bucephala albeola) Harlequin Duck 1 1.4 (Histrionicus histrionicus) Mallard 1 1.4 (Anas platyrhynchos) Total 73 100.0 TABLE 2.
clypeata y Aythya affinis) durante las temporadas de caza noviembre 2012-febrero 2013 y noviembre 2013-febrero 2014 en la presa de Atlanatepec (N 19[grados] 33.596' y O 098[grados] 11.368'), ubicada en el estado de Tlaxcala, Mexico.
De las 24 especies registradas se tiene un total de ocho aves migratorias (Branta bernicla, Aythya americana, Aythya affinis, Pelecanus erythrorhynchos, Tringa semipalmata, Numenius americanus, Limosa fedoa y Larus delawarensis) que corresponden al 38% del total; y las 16 especies restantes (62%) se consideran residentes ya que estan presentes todo el ano.
lesser scaup Aythya affinis which adjust their breeding based on the photoperiod rather than temperature or habitat availability, and should hence be more likely affected by climate change in the long-term (DeVink et al.
The reservoir is especially important for wintering ring-necked ducks, canvas-backs, and lesser scaup (Aythya affinis).
erythrorhynchus 1 Anas clypeata 1 Aythya affinis 3 Bucephala albeola fossilis 3 Oxyura jamaicensis 16 Anatid 4 Calipepla californica 3 Rallus limicola 2 Fulica americana 11 Phalaropus lobatus 1 Geococcyx californianus 2 Apheloocoma califbrnica 1 Vireo sp.
This report describes West Nile virus (WNV)-associated mortality in captive lesser scaup (Aythya affinis) ducklings that occurred in Saskatchewan, Canada, in July and August 2007.
clypeata 4 Wood duck ([double dagger]) Aix sponsa 104 Common goldeneye ([section]) Bucephala clangula 18 Canvasback ([section]) Aythya valisinena 19 Hooded merganser ([section]) Lophodytes cucullatus 26 Lesser scaup ([section]) Aythya affinis 1 Redhead ([section]) Aythya americana 223 Ring-necked duck ([section]) Aythya collaris 51 Ruddy duck ([parallel]) Oxyura jamaicensis 2 No.
One hypothesis advanced to explain the decline in lesser scaup (Aythya affinis) populations during the past 20 years is that adult female survival has decreased.
Finally, the simulated patterns of depletion did not include effects of other species that probably eat winter buds at Lake Mattamuskeet, mainly scaup (Aythya affinis, A.
Amphipods, land-use impacts, and Lesser Scaup (Aythya affinis) distribution in Saskatchewan wetlands.