La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	The population of Common Crane Grus grus in Denmark, 1990-2006
Auteurs :	Jesper Tofft, Auteur
Type de document :	Article
Dans :	Dansk Ornitologisk Forenings Tidsskrift (101(3) 2007)
Article en page(s) :	67-72
Langues:	Anglais
Résumé :	The population of Common Crane Grus grits in Denmark, 1990-2006.The Common Crane was reestablished as a breeding bird in Denmark in 1952, after it had been absent for 100 years. However, the population remained at an extremely low level until around 1990, 3-4 pairs or less, all of them in northern Jutland. The first pair outside that region was recorded in 1990 at the Baltic island of Bornholm, where numbers had grown to 12-14 pairs in 2006. Durin- the same period the population in northern Jutland started to increase and disperse to new localities, including the island of Laeso (1993). In 1997 a total of 11 pairs were known in Denmark, including one in a new region, south-central Jutland. The first pair at Lolland-Falster was recorded in 2001, and the following year a pair was established in southernmost Jutland, probably an off-shoot from the German population in Schleswig-Holstein. In 2006 there were c. 60 pairs in Denmark, 5 of them in southern Jutland. The population growth and colonization of new regions was probably initiated by immigrants from nearby, thriving populations, at least in Germany, where the increasing Crane numbers have been related to improved feeding conditions and protection in the winter quarters.

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