Swan links:
http://www.bbc.co.uk/heading_south/bewfaq.htm (general information about the Bewick's Swan)
http://www.bbc.co.uk/heading_south/species.htm (general information about the Bewick's and Whooper Swan)
http://users.bart.nl/~bewick (information about the Bewick's Swan in Europe and the dutch markingproject)
General links:
http://www.ornithologie-niedersachsen.de (information on bird research in Niedersachsen)
This site is still under construction - Please report missing websites and
dead links to - axel.degen@t-online.de