Compared with the foraging peak of White-headed Ducks
Oxyura leucocephala (7:00-9:00), Mandarin Ducks and Scaly-sided Mergansers in our study area delayed their foraging peaks.
Oxyura ferruginea "pato rana", comun, de amplia distribucion en la costa, aunque hasta ahora no se tiene ningun reporte de reproduccion en Villa.
He said that these lakes attract thousands of migratory birds each year including rare white-headed ducks (
Oxyura leucocephala) from Central Asia.
Ruddy ducks (
Oxyura jamaicensis) have relatively longer penises, compared to other waterfowl, and are known to be a highly promiscuous species, not forming pairing bonds at all.
Of the 40 species, there were nine species of shorebirds, seven dabbling ducks, five diving ducks, four waders, three gulls, and two "geese" (one was light geese, which includes Snow and Ross' Geese), in addition to Ruddy Duck (
Oxyura jamaicensis), American Coot (Fulica americana), White Pelican (Pelecanus erythrorhynchus), Double-crested Cormorant (Phalacrocorax auritus), Tundra Swan (Cygnus columbianus), Sandhill Crane, Caspian Tern (Hydroprogne caspia), and two species that could not be identified (one dabbling duck and one sandpiper).
Hillstrom et al., "Lead isotopes and lead shot ingestion in the globally threatened marbled teal (Marmaronetta angustirostris) and white-headed duck (
Oxyura leucocephala)," Science of the Total Environment, vol.
Counting three at present, the white headed ducks or
Oxyura leucocephala are on the IUCN (International Union for Conservation of Nature) red list of threatened species.
From 2009 to 2014, 17 birds, hatched in Free Flight before identification of this issue, were transferred to other institutions based on Species Survival Plan recommendations, including Bali mynah, black-necked stilt, blue-grey tanager, red-crested wood partridge, green-naped pheasant pigeon, golden-breasted starling, hooded merganser, Nicobar pigeon, ruddy duck (
Oxyura jamaicensis), and sunbittern.
En el campus hay varias especies reconocidas en alguna categoria de amenazada para la Sabana de Bogota por la ABO (2000) como Porphyriops melanops, Synallaxis subpudica,
Oxyura jamaicensis, y Charadrius vociferus.
Status overview and recommendations for conservation of the White- headed Duck
Oxyura leucocephala in Central Asia.
Oxyura - ruddy duck