Since December 2005 a new ringing programme of Bewick’s Swans runs in the Netherlands. Part of the birds is equipped with yellow collars with built-in GPS loggers (see picture). These loggers regularly record geographical locations of these birds. This should yield information about their habitat use in winter, and how this carries over to their performance during spring migration and in the breeding season. The logged data can be downloaded from a couple of 100 m with a special receiver. The researchers therefore look forward to resightings which enables them to go and look for the birds, and download the GPS data. The observations can be entered in the usual way into www.geese.org.