Mass Concentrations of Bramblings Fringilla montifringilla in Europe 1900-1983: Their Dependence upon Beech Mast and the Effect of Snow-Cover

Publication Type:Journal Article
Year of Publication:1987
Authors:Jenni, L
Journal:Ornis Scandinavica
Date Published:1987
ISBN Number:00305693
Keywords:Belgium, Denmark, Europe, France, Fringilla, Fringilla montifringilla, Fringillidae, Germany, Luxembourg, Montifringilla, Sweden
Abstract:Data on beechmast in south Sweden, Denmark, Germany and Yugoslavia, on snow-cover in Germany and on records of mass concentrations of Bramblings in Europe between 1900 and 1983, are presented. Bramblings concentrate in areas with a widespread rich beechmast crop and try to winter as far north-east as possible. Extensive snow-cover forces movements to the south and south-west, where the birds may reconcentrate if there is also a good beechmast crop. No periodicity in mass occurrences or beechmast could be detected. Interrelationships between mass concentrations indicate that Middle Europe, Belgium, Luxembourg and northern France are visited by the same winter population, while those areas to the east and to the west of the south-western migration axis would seem to receive different wintering populations.
Short Title:Ornis Scandinavica
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