Scientific Correspondence | Published:

Birds extend their ranges northwards

Naturevolume 399page213 (1999) | Download Citation

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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.

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Affiliations

  1. Centre for Biodiversity and Conservation, School of Biology, University of Leeds, Leeds, LS2 9JT, UK

    • Chris D. Thomas
    •  & Jack J. Lennon

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https://doi.org/10.1038/20335

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