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).
Asi mismo las especies Phoenicopterus chilensis, Plegadis ridgwayi y Haematopus paliatus presentaron una mayor abundancia y frecuencia de registro en el pantanal, sugiriendo una marcada preferencia por este habitat, mientras que, Phalacrocorax brasilianus, Podiceps major y
Oxyura jamaicensis presentaron mayor abundancia y frecuencia de registro en la laguna salobre (Fig.
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.
Some species, such as Bufflehead (Bucephala albeola), Common Goldeneye (Bucephala clangula), Lesser Scaup (Athya affinis), and Ruddy Duck (
Oxyura jamaicensis) have diets that are almost exclusively macroinvertebrates throughout their entire lives (Hoppe and others 1986; Bendell and McNicol 1995; Thompson and Ankney 2002), while others like American Widgeon (Anas americana) consume mostly vegetation during adulthood (Wishart 1983; Knapton and Pauls 1994).
The Feasability of Control Measures for North American Ruddy Ducks,
Oxyura Jamaicensis, in the United Kingdom, p: 397.
Other waterfowl species commonly observed on the reservoir include American wigeon (Anas americana), gadwall (Anas strepera), bufflehead (Bucephala albeola), Canada goose (Branta canadensis), ruddy duck (
Oxyura jamaicensis), wood duck (Aix sponsa), and blue-winged teal (Anas discors).
The living species of ruddy duck,
Oxyura jamaicensis, has been identified from late Pleistocene deposits at Fossil Lake (Howard 1964) and Lake Manix (Jefferson 1985).
The sample dung was procceed of domestic and wild animal such as: rhinoceros (Rhinoceros simun), dove (Columba livia), dog (Canis familiaris), rat (Rattus norvegicus), cat (Felis catus), frog (Bufo bufo), hen (Gallus domesticus), tiger (Panthera tigris), deer (Cervus elaphus), pig (Sus scrofa), horse (Equus caballus), lion (Felis leo), turkey (Meleagris gallopavo), cow (Bos taurus), duck (
Oxyura jamaicensis), donkey (Aquus spp.) and others [4, 7].
THE Latin name for the ruddy duck is
Oxyura jamaicensis.
Abstract.-In order to test inferred differences in foraging behavior of both the masked duck (Nomonyx dominicus) and the ruddy duck (
Oxyura jamaicensis), this study examined nine characters and three ratios in the mandibles of 25 male and 25 female museum specimens of both species.
Oxyura jamaicensis - reddish-brown stiff-tailed duck of North America and northern South America