Data Zone
Taxonomic source(s)
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: #http://www.aerc.eu/DOCS/Bird_taxa_of _the_WP15.xls#.
Cramp, S. and Simmons, K.E.L. (eds). 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.
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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2018 | Least Concern | |
| 2016 | Least Concern | |
| 2012 | Least Concern | |
| 2009 | Least Concern | |
| 2008 | Least Concern | |
| 2004 | Least Concern | |
| 2000 | Lower Risk/Least Concern | |
| 1994 | Lower Risk/Least Concern | |
| 1988 | Lower Risk/Least Concern |
| Migratory status | full migrant | Forest dependency | Does not normally occur in forest |
| Land mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 46,400,000 | medium |
| Extent of Occurrence non-breeding (km2) | 92,700,000 | medium |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 4900000-5199999 | poor | estimated | 2015 |
| Population trend | Decreasing | suspected | - | |
| Decline (3 years/1 generation past) | - | - | - | |
| Decline (5 years/1 generation past) | - | - | - | |
| Decline (10 years/1 generation past) | - | - | - | |
| Decline (10 years/3 generation future) | - | - | - | |
| Decline (10 years/3 generation past and future) | - | - | - | |
| Number of subpopulations | - | - | - | |
| Percentage in largest subpopulation | - | - | - | |
| Generation length (yrs) | 8.2 | - | - | - |
Population justification: The global population is estimated to number c. 4,920,000-5,130,000 individuals (Wetlands International 2016). The breeding population in Europe is estimated at 134,000-178,000 pairs, which equates to 269,000-355,000 mature individuals (BirdLife International 2015).
Trend justification: The overall population trend is decreasing, although some populations may be stable or have unknown trends (Wetlands International 2016). This species underwent a significant population increase between 1974 and 2011 in North America (Zimpfer 2011, T. McCoy in litt. 2012). In Europe the breeding population size is estimated to be decreasing by less than 25% in 24.6 years (three grenerations) (BirdLife International 2015).
| Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Afghanistan | V | Extant | ||||
| Albania | N | Extant | Yes | |||
| Algeria | V | Extant | ||||
| Antigua and Barbuda | N | Extant | Yes | |||
| Austria | N | Extant | Yes | |||
| Azerbaijan | N | Extant | Yes | |||
| Bahamas | N | Extant | ||||
| Bangladesh | N | Extant | ||||
| Barbados | V | Extant | ||||
| Belarus | N | Extant | Yes | |||
| Belgium | N | Extant | Yes | |||
| Bermuda (to UK) | N | Extant | ||||
| Bosnia and Herzegovina | N | Extant | ||||
| Bulgaria | N | Extant | Yes | Yes | ||
| Canada | N | Extant | Yes | Yes | ||
| China (mainland) | N | Extant | ||||
| Costa Rica | N | Extant | Yes | |||
| Croatia | N | Extant | Yes | |||
| Cuba | N | Extant | ||||
| Cyprus | V | Extant | ||||
| Denmark | N | Extant | Yes | Yes | ||
| Egypt | U | Extant | ||||
| Estonia | N | Extant | Yes | Yes | ||
| Faroe Islands (to Denmark) | N | Extant | Yes | |||
| Finland | N | Extant | Yes | Yes | ||
| France | N | Extant | Yes | Yes | ||
| Georgia | U | Extant | ||||
| Germany | N | Extant | Yes | Yes | ||
| Gibraltar (to UK) | V | Extant | ||||
| Greece | N | Extant | Yes | |||
| Greenland (to Denmark) | V | Extant | ||||
| Guam (to USA) | U | Extant | ||||
| Hong Kong (China) | V | Extant | ||||
| Hungary | N | Extant | Yes | |||
| Iceland | N | Extant | Yes | |||
| India | N | Extant | ||||
| Iran, Islamic Republic of | N | Extant | Yes | |||
| Iraq | N | Extant | Yes | |||
| Ireland | N | Extant | Yes | |||
| Israel | V | Extant | ||||
| Italy | N | Extant | Yes | |||
| Jamaica | V | Extant | ||||
| Japan | N | Extant | ||||
| Kazakhstan | N | Extant | ||||
| Latvia | N | Extant | Yes | Yes | ||
| Liechtenstein | N | Extant | ||||
| Lithuania | N | Extant | Yes | |||
| Luxembourg | N | Extant | ||||
| Malta | V | Extant | ||||
| Mexico | N | Extant | ||||
| Mongolia | V | Extant | ||||
| Montenegro | N | Extant | Yes | |||
| Morocco | V | Extant | ||||
| Myanmar | N | Extant | ||||
| Nepal | N | Extant | ||||
| Netherlands | N | Extant | Yes | |||
| North Korea | N | Extant | ||||
| North Macedonia | N | Extant | Yes | |||
| Northern Mariana Islands (to USA) | N | Extant | Yes | |||
| Norway | N | Extant | Yes | |||
| Pakistan | N | Extant | ||||
| Philippines | N | Extant | ||||
| Poland | N | Extant | Yes | Yes | ||
| Portugal | N | Extant | Yes | |||
| Puerto Rico (to USA) | N | Extant | ||||
| Romania | N | Extant | Yes | Yes | ||
| Russia | N | Extant | Yes | Yes | ||
| Russia (Asian) | N | Extant | Yes | |||
| Russia (Central Asian) | N | Extant | Yes | Yes | ||
| Russia (European) | N | Extant | Yes | Yes | ||
| Serbia | N | Extant | Yes | |||
| Slovakia | N | Extant | Yes | |||
| Slovenia | N | Extant | Yes | |||
| South Korea | N | Extant | ||||
| Spain | N | Extant | Yes | |||
| St Pierre and Miquelon (to France) | N | Extant | Yes | Yes | ||
| Svalbard and Jan Mayen Islands (to Norway) | V | Extant | ||||
| Sweden | N | Extant | Yes | Yes | ||
| Switzerland | N | Extant | Yes | |||
| Taiwan, China | N | Extant | ||||
| Tunisia | V | Extant | ||||
| Turkey | N | Extant | Yes | |||
| Turkmenistan | N | Extant | ||||
| Turks and Caicos Islands (to UK) | N | Extant | ||||
| Ukraine | N | Extant | Yes | Yes | ||
| United Kingdom | N | Extant | Yes | |||
| USA | N | Extant | Yes | |||
| Vietnam | N | Extant | ||||
| Virgin Islands (to USA) | V | Extant |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Grassland | Tundra | suitable | breeding |
| Marine Neritic | Estuaries | major | non-breeding |
| Marine Neritic | Macroalgal/Kelp | major | non-breeding |
| Marine Neritic | Pelagic | marginal | non-breeding |
| Marine Neritic | Seagrass (Submerged) | major | non-breeding |
| Marine Neritic | Subtidal Loose Rock/pebble/gravel | major | non-breeding |
| Marine Neritic | Subtidal Rock and Rocky Reefs | major | non-breeding |
| Marine Neritic | Subtidal Sandy | major | non-breeding |
| Marine Neritic | Subtidal Sandy-Mud | major | non-breeding |
| Wetlands (inland) | Bogs, Marshes, Swamps, Fens, Peatlands | suitable | breeding |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | suitable | non-breeding |
| Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | suitable | breeding |
| Wetlands (inland) | Permanent Rivers/Streams/Creeks (includes waterfalls) | suitable | breeding |
| Altitude | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Biological resource use | Fishing & harvesting aquatic resources - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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| Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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| Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Negligible declines | Low Impact: 5 | ||||||
|
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| Climate change & severe weather | Other impacts | Timing | Scope | Severity | Impact | ||||
| Ongoing | Whole (>90%) | Unknown | Unknown | ||||||
|
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| Energy production & mining | Oil & gas drilling | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
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| Energy production & mining | Renewable energy | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
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| Pollution | Industrial & military effluents - Oil spills | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
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| Purpose | Primary form used | Life stage used | Source | Scale | Level | Timing |
|---|---|---|---|---|---|---|
| Food - human | - | - | Non-trivial | Recent | ||
| Pets/display animals, horticulture | - | - | International | Non-trivial | Recent | |
| Sport hunting/specimen collecting | - | - | Non-trivial | Recent |
Recommended citation
BirdLife International (2021) Species factsheet: Aythya marila. Downloaded from
http://www.birdlife.org on 17/04/2021.
Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 17/04/2021.
