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As knowledge about the European long-tailed duck\u2019s life cycle and movement ecology is limited, we investigate its year-round spatiotemporal distribution patterns. Specifically, we aimed to identify the wintering grounds, timing of migration and staging of this population via light-level geolocation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Of the 48 female long-tailed ducks tagged on Kolguev Island (western Russian Arctic), 19 were recaptured to obtain data. After breeding and moulting at freshwater lakes, ducks went out to sea around Kolguev Island and to marine waters ranging from the White Sea to Novaya Zemlya Archipelago for 33\u2009\u00b1\u200910\u00a0days. After a rapid autumn migration, 18 of 19 birds spent their winter in the Baltic Sea and one bird in the White Sea, where they stayed for 212\u2009\u00b1\u20093\u00a0days. There, they used areas known to host long-tailed ducks, but areas differed among individuals. After a rapid spring migration in mid-May, the birds spent 23\u2009\u00b1\u20093\u00a0days at sea in coastal areas between the White Sea and Kolguev Island, before returning to their freshwater breeding habitats in June.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The Baltic Sea represents the most important wintering area for female long-tailed ducks from Kolguev\u00a0Island. Important spring and autumn staging areas include the Barents Sea and the White Sea. Climate change will render these habitats more exposed to human impacts in the form of fisheries, marine traffic and oil exploitation in near future. Threats that now operate in the wintering areas may thus spread to the higher latitude staging areas and further increase the pressure on long-tailed ducks.<\/jats:p><\/jats:sec>","DOI":"10.1186\/s12898-020-00299-2","type":"journal-article","created":{"date-parts":[[2020,5,25]],"date-time":"2020-05-25T21:02:32Z","timestamp":1590440552000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Year-round spatiotemporal distribution pattern of a threatened sea duck species breeding on Kolguev Island, south-eastern Barents Sea"],"prefix":"10.1186","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6433-3013","authenticated-orcid":false,"given":"Thiemo","family":"Karwinkel","sequence":"first","affiliation":[]},{"given":"Ingrid L.","family":"Pollet","sequence":"additional","affiliation":[]},{"given":"Sandra","family":"Vardeh","sequence":"additional","affiliation":[]},{"given":"Helmut","family":"Kruckenberg","sequence":"additional","affiliation":[]},{"given":"Petr","family":"Glazov","sequence":"additional","affiliation":[]},{"given":"Julia","family":"Loshchagina","sequence":"additional","affiliation":[]},{"given":"Alexander","family":"Kondratyev","sequence":"additional","affiliation":[]},{"given":"Benjamin","family":"Merkel","sequence":"additional","affiliation":[]},{"given":"Jochen","family":"Bellebaum","sequence":"additional","affiliation":[]},{"given":"Petra","family":"Quillfeldt","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2020,5,25]]},"reference":[{"key":"299_CR1","volume-title":"Handbuch der V\u00f6gel Mitteleuropas, Anseriformes (1.Teil)","author":"UN von Blotzheim","year":"1992","unstructured":"von Blotzheim UN, Bauer KM. 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No permissions or ethics approval were required, as the work with long-tailed ducks is covered by the Russian hunting legislation, Federal law No 209-FZ of 24 July 2009 \u201cOn hunting and hunting resources conservation and on changes in some legislative acts of Russian Federation\u201d. The study was conducted in accordance with Federal law No 52-FZ of 24 April 1995 \u201cOn animal wildlife\u201d and with the concurrence of the Russian Bird Ringing Centre.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not applicable.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare that they have no competing interests.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"31"}}