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Whooper swan cygnus...
Whooper swan cygnus cygnus January population censuses for northwest mainland Europe, 1995-2015
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- Laubek, Bjarke (author)
- No affiliation available (private)
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- Clausen, Preben (author)
- Aarhus University
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- Nilsson, Leif (author)
- Lund University,Lunds universitet,Biodiversitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Biodiversity,Department of Biology,Faculty of Science
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- Wahl, Johannes (author)
- Federation of German Avifaunists (DDA)
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Wieloch, Maria (author)
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- Meissner, Włodzimierz (author)
- University of Gdansk
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- Shimmings, Paul (author)
- BirdLife Norway
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Larsen, Bjørn Harald (author)
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- Hornman, Menno (author)
- Dutch Centre for Field Ornithology
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- Langendoen, Tom (author)
- Wetlands International
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- Lehikoinen, Aleksi (author)
- Finnish Museum of Natural History
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- Luigujõe, Leho (author)
- Estonian University of Life Sciences - EMÜ
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- Stīpniece, Antra (author)
- University of Latvia
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Švažas, Saulius (author)
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Sniauksta, Laimonas (author)
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- Keller, Verena (author)
- The Swiss Ornithological Institute
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Gaudard, Clémence (author)
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- Devos, Koen (author)
- Research Institute for Nature and Forest
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- Musilová, Zuzana (author)
- Czech University of Life Sciences Prague
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- Teufelbauer, Norbert (author)
- BirdLife Austria
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- Rees, Eileen C. (author)
- Wildfowl & Wetlands Trust
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- Fox, Anthony D. (author)
- Aarhus University
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(creator_code:org_t)
- 2020
- 2020
- English 20 s.
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In: Wildfowl. - 0954-6324. ; :69, s. 103-122
- Related links:
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https://lup.lub.lu.s...
Abstract
Subject headings
Close
- Internationally coordinated censuses of Whooper Swans Cygnus cygnus across continental northwest Europe were undertaken in mid-winter 1995, 2000, 2005, 2010 and 2015. The estimate of 138,500 birds in 2015, the highest to date, represented a more than doubling of the population size (at an annual increase of 4.1%) since the first census total of 59,000 swans in 1995. The largest increase was in Denmark, where numbers almost trebled from 21,740 in 1995 to 62,620 in 2015. More than 97% of all swans were counted in just six countries. The percentage of total numbers increased significantly between 1995 and 2015 in Denmark (from 36.5% to 45.2%) and Germany (26.0% to 34.7%), but declined significantly in Sweden (14.2% to 8.4%), Norway (13.1% to 3.6%), Poland (6.2% to 4.0%) and the Netherlands (2.4% to 1.7%). The counts show an increasing discrepancy between national trends in abundance for Whooper Swans in Sweden and especially in Denmark in comparison with results obtained only from mid-winter International Waterbird Count (IWC) site coverage. This demonstrates the increasing tendency for Whooper Swans to winter in areas away from traditionally counted IWC sites and confirms the continued need for a regular cycle of coordinated dedicated swan counts to anchor population trends generated from other data sources.
Subject headings
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Keyword
- Census
- Distribution
- Mainland Europe
- Population size
- Whooper Swan
Publication and Content Type
- art (subject category)
- ref (subject category)
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Wildfowl
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To the university's database
- By the author/editor
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Laubek, Bjarke
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Clausen, Preben
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Nilsson, Leif
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Wahl, Johannes
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Wieloch, Maria
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Meissner, Włodzi ...
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show more...
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Shimmings, Paul
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Larsen, Bjørn Ha ...
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Hornman, Menno
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Langendoen, Tom
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Lehikoinen, Alek ...
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Luigujõe, Leho
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Stīpniece, Antra
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Švažas, Saulius
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Sniauksta, Laimo ...
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Keller, Verena
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Gaudard, Clémenc ...
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Devos, Koen
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Musilová, Zuzana
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Teufelbauer, Nor ...
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Rees, Eileen C.
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Fox, Anthony D.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Ecology
- Articles in the publication
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Wildfowl
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Lund University