Among them two the little known woolly flying squirrel, eupetaurus cinereus, found in the northern mountains of gilgit and chitral, and the indus. A fossil species from the late pliocene or early pleistocene of jalisco mexico was described as oxyura zapatanima. The whiteheaded duck oxyura leucocephala has undergone a considerable decline in range and population size this century, with the destruction and degradation of. The first breeding in captivity of the whiteheaded duck oxyura leucocephala at slimbridge enabled studies to be made of courtship, nesting, incubation and. Affordable and search from millions of royalty free images, photos and vectors. Habitat selection of marbled teal and whiteheaded duck during. Wildscreens arkive project was launched in 2003 and grew to become the worlds biggest encyclopaedia of life on earth. By 2000, the uk population peaked at nearly 6,000 individuals. Diurnal activity budget and breeding ecology of the whiteheaded duck oxyura leucocephala at lake tonga northeast algeria. Pdf hope for the whiteheaded duck, oxyura leucocephala aves. Lead isotopes and lead shot ingestion in the globally threatened marbled teal marmaronetta angustirostris and whiteheaded duck oxyura leucocephala fredrik svanberg a. The current world wintering population is estimated at 19,000 birds, with the likelihood that additional birds occur in unsurveyed wetlands in asia. By 1991 hybrids resulting from crosses between ruddy ducks and the indigenous white.
Lead isotopes and lead shot ingestion in the globally. The whiteheaded duck, oxyura leucocephala, a native of spain is a closely related species to the ruddy duck. Whiteheaded duck oxyura leucocephala birdlife species. Recommended english names, princeton university press, isbn. Ruddy duck oxyura jamaicensis timing scope severity impact ongoing minority oxyura leucocephala. A larger middle pleistocene fossil form from the southwestern usa was described as oxyura bessomi. Leucaena leucocephala can replace alfalfa scapinello et al. May 11, 2020 whiteheaded duck oxyura leucocephala check out the full taxonomy and distribution of whiteheaded duck on hbw alive. Files are available under licenses specified on their description page. The whiteheaded duck oxyura leucocephala is a small stifftailed duck some 45 cm 18 in long. Post jobs, find pros, and collaborate commission free in our professional marketplace.
Whiteheaded duck oxyura leucocephala check out the full taxonomy and distribution of whiteheaded duck on hbw alive. Mar 27, 2018 during an organisms evolution, functional adaptations help species to become better suited to their ecological niches. I took these footages with hasselblad superachromat 250mm lens that is attached to sony ax100 camcorder via showtime adapter. Jan 20, 2015 most of this decline is due to habitat loss and hunting, but interbreeding of the spanish population with the introduced ruddy duck oxyura jamaicensis is a more recent threat. Hybridization between whiteheaded ducks and introduced. Pdf the status of the whiteheaded duck oxyura leucocephala. Most of this decline is due to habitat loss and hunting, but interbreeding of the spanish population with the introduced ruddy duck oxyura jamaicensis is a more recent threat. The aim of the project is to contribute to the development of the local work in studying and conservation of oxyura leucocephala in barabinskaya lowland. The genus name is derived from ancient greek oxus, sharp, and oura, tail all have, as their name implies, long, stiff tail feathers, which are erected when the bird is resting. Male in full plumage has white head and a bright blue, almost grotesquely swollen bill, which is smaller and greyer in summer.
A model of ruddy duck oxyura jamaicensis eradication for. The whiteheaded duck oxyura leucocephala is the only stifftail oxyurini indigenous to the palearctic. Oxyura leucocephala scopoli, 1769 birdlife international. Leucaena leaf meal may be included at 25% when supplementing a diet based on cassava peels and gliricidia sepium and at 3040% when rabbits are fed with arachis pintoi. The globally threatened whiteheaded duck is one the most rare duck species in the western. The ruddy duck oxyura jamaicensis is a duck from north america and one of the stifftailed ducks.
Genetic studies facilitated management decisions on the. In 1991, hybridisation with the native and globally threatened iucn endangered whiteheaded duck oxyura leucocephala, a. It is also unusual that the motive is to protect international biodiversity and, in particular, the status of the whiteheaded duck oxyura leucocephala in spain. Status overview and recommendations for conservation of the whiteheaded duck in central asia 35 the species breeds in small numbers in wetlands of the great lakes basin. They are extremely aquatic and do best on large ponds of variable depth, with clean, deep water and plenty of natural food available in the form of marginal aquatic plants, while a muddy pond bottom will provide food items such as tubifex worms. The whiteheaded duck oxyura leucocephala has undergone a considerable decline in range and population size this century, with the destruction and degradation of habitat and hunting being the causes. Malvasia european red list assessment european red list status en endangered, iucn version 3. A model of ruddy duck oxyura jamaicensis eradication for the uk. Status of the whiteheaded duck oxyura leucocephala in northeast algeria. Currently considered globally endangered, with a population estimated at no more than c. The project will be implemented in barabinskaya lowland, the southeast part of western siberia. Specializations of the lingual organ is a critical adaptation of birds, such as the whiteheaded duck oxyura leucocephala, that. The largest populations of whiteheaded ducks are found in russia, kazakhstan, turkey, iran, afghanistan, tajikistan, turkmenistan, uzbekistan, armenia, and mongolia. Whiteheaded duck oxyura leucocephala the greatest longterm threat to the species survival is thought to be competition and introgressive hybridisation i.
The spanish population has recently recovered rapidly after being near to extinction in the 1970s. In fact, some taxonomists, including the american ornithological society, still consider it conspecific. The original flock settled quickly in their new habitat and started breeding. Duck, oxyura leucocephala, in turkey was analysed based on all.
We utilized a simple generic model, which includes uncertainty in parameter estimates and can be used for any invasive species. Species or subspecies currently listed as such in one or both appendices. Oxyura species oxyura leucocephala name synonyms anas leucocephala scopoli, 1769 homonyms oxyura leucocephala scopoli, 1769 common names ahate buruzuria in basque gobbo rugginoso in italian gobbo rugginoso in italian hvidhovedet skarveand in danish. Whiteheaded ducks can also be found in parts of the oriental region and the ethiopian region. Abstract the ruddy duck oxyura jamaicensis, a stifftail native to the. A model of ruddy duck oxyura jamaicensis eradication for the. The greatest threat, however, now comes from hybridization and competetion with the ruddy duck oxyura jamaicensis.
A flock of 20 birds was introduced into britain from america before 1950. It is known that ruddy duck x whiteheaded duck hybrids are fertile to the second generation in captivity, which poses an. Whiteheaded ducks oxyura leucocephala are the only stifftail oxyurinii native to the palearctic. Its breeding habitat is lakes with open water and dense vegetation at the margin. Morphological reflections of evolutionary adaptations in. From the morphological aspect, these adaptations are reflected in the anatomical specializations of different organs. Status overview and recommendations for conservation of. Oxyura leucocephala scopoli, 1769 animalia chordata aves anseriformes anatidae common names. The whiteheaded duck oxyura leucocephala is a small stifftailed duck some 45 cm 18 in. Leucaena leucocephala is more palatable than arachis pintoi nieves et al. Conservation of oxyura leucocephala in barabinskay lowland. This autumn, between and 16 september 2016, more than 20,000 birds in three huge flocks were estimated to be present at.
The stifftailed ducks, oxyura, are part of the oxyurini tribe of ducks. Nov 12, 2011 a fossil species from the late pliocene or early pleistocene of jalisco mexico was described as oxyura zapatanima. Description mediumsized duck l 45 cm, unmistikable because of it shape and colour. This file is licensed under the creative commons attributionshare alike 2. Understanding habitat requirements is vital for developing successful management strategies for threatened species. Specializations of the lingual organ is a critical adaptation of birds, such as the whiteheaded duck oxyura leucocephala, that enables their nutritional. The main causes of the decline in range have been wetland drainage, hunting, disturbances, pesticides and egg and juveniles predation from rats and dogs. During an organisms evolution, functional adaptations help species to become better suited to their ecological niches. Leucaena is a longlived perennial legume around 23 year halflife in difficult conditions in australia. With the help of over 7,000 of the worlds best wildlife filmmakers and photographers, conservationists and scientists, featured multimedia factfiles for more than 16,000 endangered species. Action plan for the whiteheaded duck oxyura leucocephala. Whiteheaded ducks oxyura leucocephala are the only stifftail oxyurinii native to. Download fulltext pdf the status of the whiteheaded duck oxyura leucocephala article pdf available in bird conservation international 203. Pdf on the behaviour of the whiteheaded duck with especial.
This autumn, between and 16 september 2016, more than 20,000 birds in three huge flocks were. Hbw alive contains information on descriptive notes, voice, habitat, food and feeding, breeding, movements, status and conservation plus a list of bibliographical references for this species account. Malvasia cabeciblanca anec capblanc whiteheaded duck oxyura leucocephala, male, clotdegalvany, alicante, espana date. In spain, ruddy ducks hybridize with the globally endangered whiteheaded duck, oxyura leucocephala. Oxyura jamaicensis ruddy duck threatens the globally endangered whiteheaded. The ruddy duck, oxyura jamaicensis, was introduced to great britain in the mid20th century and has recently spread to other western european countries. Conservation of oxyura leucocephala in barabinskay lowland russia evgeniy murzakhanov. Diurnal activity and breeding ecology of the whiteheaded. Oxyura leucocephala wikispecies, free species directory. Status overview and recommendations for conservation of the. Oxyura jamaicensis ruddy duck threatens the globally endangered whiteheaded duck see oxyura leucocephala in iucn red list of threatened species with extinction through introgressive hybridisation and competition. Whiteheaded duck oxyura leucocephala videos, photos and. Oxyura leucocephala, an arctic sea bird in the family anatidae.
The global population, which was probably over 100 000 in the early twentieth century, has decreased to 8 000 000 individuals in 2002. Pdf the development of the breeding and nonbreeding. This is an unusual programme given that the target is a bird and effort is spread throughout the uk. The north american ruddy duck oxyura jamaicensis established a feral population in the uk more than 40 years ago, and it is now threatening the endangered white. The male has a white head with black crown, a blue bill, and reddishgrey plumage. Status overview and recommendations for conservation of the whiteheaded duck oxyura leucocephala in central asia. The whiteheaded duck breeds principally in small, shallow. Oxyura leucocephala wikipedia an piemonteis, lenciclopedia. We assessed the effects of hybridization on the spanish whiteheaded ducks, which. Morphological reflections of evolutionary adaptations in the.
Conservation of the whiteheaded duck oxyura leucocephala. The status of the whiteheaded duck oxyura leucocephala. The diets of the whiteheaded duck oxyura leucocephala, ruddy duck o. The female has a dark bill and rather duller colouring. It resembled a small ruddy duck or, even more, argentine bluebill. The ruddy duck oxyura jamaicensis, a stifftail native to the americas, was introduced to the uk in the 1950s and has since been recorded in 22 western palearctic countries. The genus name is derived from ancient greek oxus, sharp, and oura, tail, and jamaicensis is from jamaica. Browse and buy exceptional, royalty free stock clips, handpicked by the best.
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