2004/10/01 by Kasper Thorup · 37 citations
Environmental Science · #Animal Ecology and Behavior Studies #Avian ecology and behavior #Biology #Demography #Ecology #Geography #Population #Vagrancy #Wildlife Ecology and Conservation
paper · pdf · doi:10.1080/00063650409461358
published in Bird Study 51(3), 228-238 (Taylor & Francis)
openalex publication_date 2004/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Capsule Reverse migration in autumn does not occur to the same degree in all species of migrants, but is related to migratory direction. Aims To identify factors determining degree of reverse migration and specifically to test whether it occurs in long-distance migrant species irrespective of their standard (normal) migration direction. Methods Multiple regression analysis on the number of individuals occurring as reverse migrants observed in northwest European countries. Methods Multiple regression analysis on the number of individuals occurring as reverse migrants observed in northwest European countries. Results The number of reverse migrants observed in northwest European countries is strongly correlated with standard migratory direction, estimated population size and detectability, but an effect of the distance travelled from the breeding areas is not supported. The pattern holds true for subsamples of the data set, including British and Irish records or Scandinavian records only, and when controlling for phylogeny. Conclusion Birds that migrate eastward in autumn from their breeding grounds, mostly in eastern Europe, are more likely to consistently reverse migrate than those species migrating southward mostly from southern Europe.