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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Results from recent Common Crane Grus grus surveys at the resting sites in the Muritz area
Auteurs :	Andreas Boldt, Auteur ; Hans-Juergen Jessel, Auteur ; Rainer Schwarz, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (131(2) 2010)
Article en page(s) :	129-134
Résumé :	The Muritz area was considered one of the most important Common Crane stopver sites in Central Europe until the mid 1950s. Thereafter, the region has lost its special status for three decades. But with the beginning of the 1980s a fast development of cranes resting in the region has been reflected in the marked increase of crane numbers at resting sites, especially within the last ten years. This period also saw the establishment of five new roosts. The recent maximum of 21,000 cranes was reached on 12(th) October 2008. The most important roosts in the region at present are the east bank of the Muritz lake, the Kolpin lake, the Grosse Schwerin and the Krummeler lake. At peak stopover times these sites hold about 90% of the population. In the past ten years peak numbers were documented for the first and second decade of October. Since 2006 prolonged resting times have lasted until December and January. For the first time, overwintering of 650 cranes was documented for the region in 2006/2007.Ring readings provided knowledge about the origin and habitat ranging of single individuals, but also permitted to investigate correlations between different roost sites. Ring readings comprised country codes of resting cranes originating from Poland, Estonia, Finland, and Sweden.

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