Birds extend their ranges northwards

Chris D. Thomas () and Jack J. Lennon
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Chris D. Thomas: Centre for Biodiversity and Conservation, School of Biology, University of Leeds
Jack J. Lennon: Centre for Biodiversity and Conservation, School of Biology, University of Leeds

Nature, 1999, vol. 399, issue 6733, 213-213

Abstract: Abstract We have analysed the breeding distributions of British birds over a 20-year period. After controlling for overall population expansions and retractions, we find that the northern margins of many species have moved further north by an average of 18.9 km during this time. This general northward shift took place during a period of climatic warming, which we propose might be causally involved.

Date: 1999
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DOI: 10.1038/20335

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