|Scientific Name:||Aythya ferina|
|Species Authority:||(Linnaeus, 1758)|
|Taxonomic Source(s):||del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.|
|Identification information:||42-49 cm, wingspan 72-82 cm (Snow and Perrins 1998). Breeding male has rufous-chestnut head, blackish breast, upper mantle, undertail-coverts, rump and tail, silver-grey flight feathers and almost white underwing, grey body, dark grey bill with black tip and bright orange-red eyes (Carboneras and Kirwan 2014). Eclipse plumage similar to adult female. Female has dull brown head with pale grey eyestripe, throat, lores and cheeks. Body greyish-brown, darker above. Wings generally browner than those of male. Bill dull grey/black with black tip and eyes brown. Juvenile resembles adult female. Similar species Redhead A. americana very similar but male A. ferina has red rather than yellow iris, different pattern on bill, female A. ferina has different bill colour and whiter flanks. Male A. ferina smaller than Canvasback A. valisineria, which is paler with blackish wash to head, flatter forehead and much longer, all-dark bill (Carboneras and Kirwan 2014). Voice Male generally silent but makes wheezy whistles in display, female makes mainly monosyllabic calls (Carboneras and Kirwan 2014).|
|Red List Category & Criteria:||Vulnerable A2ab+3b+4ab ver 3.1|
|Reviewer(s):||Butchart, S. & Symes, A.|
|Contributor(s):||Choudhury, A., Nagy, S., Langendoen, T., Heim, W., Baccetti, N., Petkov, N., Vogrin, M., Sorrenti, M., Virkkala, R., Raudonikis, L., Singh, R.K.B., Vyas, V., Hearn, R., Balachandran, S., Caizergues, A., Kasambe, R., Ming, M., Ushiyama, K., Solovyeva, D., Chowdhury, S., Moores, N. & Gombobaatar, S.|
|Facilitator/Compiler(s):||Ashpole, J, Burfield, I., Butchart, S., Ekstrom, J., Malpas, L., Pople, R., Wheatley, H. & Wright, L|
This species has an extremely large range in both the breeding season and in winter, and an extremely large population. The population was not thought to be declining sufficiently rapidly to approach the threshold for Vulnerable under the population size reduction criterion. However new information suggests the population has declined rapidly across the majority of the range, and it has therefore been uplisted to Vulnerable. Although the species might be expected to benefit from a reduction in eutrophication, this does not appear to have been the case.
|Previously published Red List assessments:|
|Range Description:||The species breeds from western Europe through central Asia to south-central Siberia and northern China (Carboneras and Kirwan 2014). It is present throughout the year but may make within-winter movements. European migratory populations winter mostly in north-western and western Europe, the eastern Mediterranean, Black Sea and the Caspian Sea, as well as in Turkey, the Middle East and as far south as sub-Saharan Africa (Hagemeijer and Blair 1997, Carboneras and Kirwan 2014). Birds breeding in east of range winter in south-east and east Asia across the Indian sub-continent as far east as Japan.|
Native:Afghanistan; Albania; Algeria; Armenia (Armenia); Austria; Azerbaijan; Bahrain; Bangladesh; Belarus; Belgium; Bhutan; Bosnia and Herzegovina; Bulgaria; China; Croatia; Cyprus; Czech Republic; Denmark; Egypt; Eritrea; Estonia; Ethiopia; Finland; France; Gambia; Georgia; Germany; Greece; Guam; Guinea-Bissau; Hungary; Iceland; India; Iran, Islamic Republic of; Iraq; Ireland; Israel; Italy; Japan; Jordan; Kazakhstan; Korea, Democratic People's Republic of; Korea, Republic of; Kuwait; Kyrgyzstan; Latvia; Lebanon; Libya; Liechtenstein; Lithuania; Luxembourg; Macedonia, the former Yugoslav Republic of; Mali; Malta; Mauritania; Moldova; Mongolia; Montenegro; Morocco; Myanmar; Nepal; Netherlands; Nigeria; Northern Mariana Islands; Norway; Oman; Pakistan; Palestinian Territory, Occupied; Philippines; Poland; Portugal; Qatar; Romania; Russian Federation; Saudi Arabia; Senegal; Serbia (Serbia); Slovakia; Slovenia; South Sudan; Spain (Canary Is., Spain (mainland)); Sudan; Sweden; Switzerland; Syrian Arab Republic; Taiwan, Province of China; Tajikistan; Tanzania, United Republic of; Thailand; Tunisia; Turkey; Turkmenistan; Uganda; Ukraine; United Arab Emirates; United Kingdom; Uzbekistan; Viet Nam; Yemen
Vagrant:Burkina Faso; Canada; Cape Verde; Chad; Congo; Faroe Islands; Ghana; Kenya; Liberia; Niger; Sri Lanka; United States (Georgia - Native); Western Sahara
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||The global population is estimated to number c. 1,950,000-2,250,000 individuals (Wetlands International 2012). The European population is estimated at 198,000-285,000 pairs, which equates to 397,000-570,000 mature individuals (BirdLife International 2015).|
Trend Justification: The overall population trend is decreasing, although some populations may be stable and others have unknown trends (Wetlands International 2006). In Europe the population size is estimated to be decreasing by 30-49% in 22.8 years (three generations) (BirdLife International 2015). In winter, the population size in Europe is estimated to be decreasing at the same rate. Europe holds between 35% (breeding) and 40% (wintering) of the global population, so these declines are significant. The flyway population breeding in western Siberia and wintering in south-west Asia also appears to be declining, although this may at least partly reflect recent variation in monitoring effort (Nagy et al. 2014). No recent information is available about the sizes or trends of the two other flyway populations, which breed in central Asia and winter in south and east Asia, respectively (Wetlands International 2012), and which together are thought to comprise around one third of the global population. Populations in Bangladesh (S. Chowdhury in litt. 2015), Japan (K. Ushiyama in litt. 2015) and South Korea (N. Moores in litt. 2015) are reported to be decreasing. Population declines have not been observed in China (M. Ming in litt. 2015) or Mongolia (S. Gombobaatar in litt. 2015).
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||This species requires well-vegetated eutrophic to neutral swamps, marshes, lakes and slow-flowing rivers with areas of open water and abundant emergent fringing vegetation. It also breeds on saline, brackish and soda lakes and occasionally even in sheltered coastal bays (Kear 2005). The breeding grounds are reoccupied from early March (in the south) to early May (in Siberia) (Scott and Rose 1996) with breeding starting from April-May. During the winter the species frequents similar habitats to those it breeds in, including large lakes, slow-flowing rivers, reservoirs, brackish waters, marshes, weirs (Africa) and flooded gravel pits (Brown et al. 1982, Madge and Burn 1988, del Hoyo et al. 1992, Fox et al. 1994, Scott and Rose 1996). The nest is a depression or shallow cup in a thick heap of vegetation positioned on the ground in shallow water (Johnsgard 1978, Madge and Burn 1988, del Hoyo et al. 1992, Snow and Perrins 1998, Kear 2005b). As in the breeding season, the species will shift to coastal habitats such as brackish lagoons, tidal estuaries and inshore waters (where it associates with sewage outfalls [Kear 2005b]) when driven by frost or other compelling factors (Madge and Burn 1988, del Hoyo et al. 1992, Scott and Rose 1996, Snow and Perrins 1998).|
The species is omnivorous, its diet consisting of seeds, roots, rhizomes, the vegetative parts of grasses, sedges and aquatic plants as well as aquatic insects and larvae, molluscs, crustaceans, worms, amphibians and small fish (Johnsgard 1978, Brown et al. 1982, del Hoyo et al. 1992, Marsden and Bellamy 2000, Kear 2005b).
Northern populations of this species are highly migratory (Scott and Rose 1996, Snow and Perrins 1998). Those breeding in the milder parts of western or southern Europe are sedentary or only make short-distance dispersal movements governed by harsh weather conditions (del Hoyo et al. 1992, Scott and Rose 1996, Snow and Perrins 1998).
|Systems:||Terrestrial; Freshwater; Marine|
|Continuing decline in area, extent and/or quality of habitat:||Unknown|
|Generation Length (years):||7.6|
|Movement patterns:||Full Migrant|
|Congregatory:||Congregatory (and dispersive)|
The species is threatened by disturbance from hunting (del Hoyo et al. 1992, Evans and Day 2002, Kear 2005b), water-based recreation (Fox et al. 1994, Kear 2005b) and from machinery noise from urban development (Marsden 2000). It is also threatened by habitat destruction (del Hoyo et al. 1992) on its wintering grounds due to eutrophication (partially as a result of nutrient run-off from agricultural land) (Kear 2005b, L. Raudonikis in litt. 2015). The species suffers from nest predation by American Mink Neovison vison in Poland (Bartoszewicz and Zalewski 2003), and adults are poisoned by ingesting lead shot (Spain) (Mateo et al. 1998) and drowned in freshwater fishing nets with mesh sizes greater than 5 cm (China) (Quan et al. 2002). The species is also susceptible to avian influenza, so may be threatened by future outbreaks of the disease (Melville and Shortridge 2006).
It is hunted in numerous countries across the range including Northern Ireland (Evans and Day 2002), Spain (Mateo et al. 1998) and Italy (Sorrenti et al. 2006), and the eggs of this species used to be (and possibly still are) harvested in Iceland (Gudmundsson 1979). The species is also hunted for commercial and recreational purposes in Gilan Province, northern Iran (Balmaki and Barati 2006).
Conservation and Research Actions Underway
EU Birds Directive Annex II. CMS Appendix II. The cyclical removal of adult fish from an artificial waterbody (gravel pit) in the U.K. attracted nesting pairs to the area by causing an increase in invertebrate food availability and an increase in the growth of submerged aquatic macrophytes. The removed fish (dead or alive) were sold to generate funds (Giles 1994). In the Trebon Basin Biosphere Reserve, Czech Republic, it was found that artificial islands and wide strips of littoral vegetation are the most secure breeding habitats that can be created for the species (nest survival in littoral habitats was improved by reduced nest visibility, increased water depth, and increased distance from the nest to the habitat edge, and nest survival on islands was improved with increased distance to open water) (Albrecht et al. 2006). The use of lead shot in Europe is being phased out.
Conservation and Research Actions Proposed
This species would benefit from the protection and maintenance of wetland habitat. Lead shot use should continue to be prohibited and legislation properly enforced. Accurate monitoring of bag numbers in countries where this species is hunted should be implemented and maintained. Reduce nutrient run-off from agricultural land.
|Citation:||BirdLife International. 2016. Aythya ferina. The IUCN Red List of Threatened Species 2016: e.T22680358A92857599.Downloaded on 21 January 2017.|
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