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Citizen science data confirm that expanding non-breeding distributions of goose and swan species correlate with their increasing abundance

Henning Heldbjerg, Auteur ; Timme Nyegaard, Auteur ; Preben Clausen, Auteur ; Rasmus Due Nielsen, Auteur ; Anthony D. Fox, Auteur

Dans Ibis (167(1) January, 2025)

We combined data from two independent Danish citizen science time-series to describe changes in (1) abundance and (2) distribution of 12 wintering populations of geese and swans and tested the hypothesis that increases in national abundance sinc[...]

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Article

Climate-change not only threatens bird populations but also challenges our ability to monitor them

Anthony D. Fox, Auteur ; Rasmus Due Nielsen, Auteur ; Ib Krag Petersen, Auteur

Dans Ibis (161(2) April, 2019)

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Disturbance of waterbirds by water-based recreational activities - a review

Karsten Laursen, Auteur ; Thomas Bregnballe, Auteur ; Ole Roland Therkildsen, Auteur ; Thomas Eske Holm, Auteur ; Rasmus Due Nielsen, Auteur

Dans Dansk Ornitologisk Forenings Tidsskrift (111(3) 2017)

Thousands of waterbirds breed, stage, moult and winter in Danish waters in concentrations that require the authorities to protect them according to the EU Birds Directive. In addition to waterbirds, the more than 7000 km of coastline around Denm[...]

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Geese in Northeast and North Greenland as recorded on aerial surveys in 2008 and 2009

David Boertmann, Auteur ; Kent Olsen, Auteur ; Rasmus Due Nielsen, Auteur

Dans Dansk Ornitologisk Forenings Tidsskrift (109(4) 2015)

Aerial surveys of geese were carried out in July/August 2008 and 2009 in Northeast and North Greenland. Moulting Pink-footed Geese Anser brachyrhynchus had increased considerably in numbers compared to results of similar surveys in 1988 up to th[...]

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