Mark Smyth
Member
a new paper has just been released showing the most up to date information on common swift migration. Swifts went to and from Africa with geologgers on their backs.
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0041195
In another study a swift took only 5.5 days to get from the Congo to its nest box in East Anglia
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0041195
In another study a swift took only 5.5 days to get from the Congo to its nest box in East Anglia