Menu

Javascript is not activated in your browser. This website needs javascript activated to work properly.
You are here

Diffuse, short and slow migration among Blue Tits

Author:
  • Anna Nilsson
  • Thomas Alerstam
  • Jan-Åke Nilsson
Publishing year: 2008
Language: English
Pages: 365-373
Publication/Series: Journal für Ornithologie1852-12-31+01:002004-01-01+01:00
Volume: 149
Issue: 3
Document type: Journal article
Publisher: Springer

Abstract english

The knowledge of migration systems in long-distance regular migrants is in many cases extensive. Our understanding of the migratory characteristics of partial migrants, on the other hand, is far more rudimentary. We investigated migratory characteristics of partially migratory Blue Tits Cyanistes caeruleus using ringing recoveries of Swedish birds, to answer questions about geographic migration patterns, age-specific migrations, migration speeds and synchrony of movements. Median migration distance of Swedish Blue Tits was 82 km, with a main autumn direction in the sector between S and W (large directional scatter). Northerly and southerly populations did not differ in migration directions or distances, suggesting chain migration to be the general pattern. A larger proportion of adult Blue Tits remained near the breeding grounds during winter than was the case for juveniles. Some of the migrating birds (17%) seemed not to return in spring but stayed to breed closer to the winter area. Swedish Blue Tits show an exceptionally slow migration speed (median 13 km/day), among the slowest speeds recorded for any migrant bird. The Blue Tit represents an extreme case of diffuse, short and slow bird migration.

Keywords

  • Biological Sciences
  • migration
  • partial migration
  • adaptations to
  • short-distance migration
  • timing of migration

Other

Published
  • ISSN: 1439-0361
Thomas Alerstam
E-mail: thomas [dot] alerstam [at] biol [dot] lu [dot] se

Professor emeritus

Evolutionary ecology

+46 46 222 37 85

E-C225

Sölvegatan 37, Lund

50

Centre for Animal Movement Research
Evolutionary Ecology, Department of Biology
Ecology building S-223 62 Lund Sweden