La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	A long term study of the age-structure of a population of Jackdaws Coloeus monedula in South West Thuringia, Germany (2012)
Auteurs :	Klaus Schmidt, Auteur
Type de document :	Article
Dans :	Vogelwarte (50(3) AUG 2012)
Article en page(s) :	169-176
Langues:	Allemand
Résumé :	5014 young Jackdaws were marked with rings of the Vogelwarte Hiddensee from 1971 to 2011. Most of the birds got three additional colour rings. The recoveries und readings of the colour rings give information about the migration and the circannual rhythm of the Jackdaws in the breeding colonies. Only 1% of the one-year-old birds stay in their colonies in winter, but 20% of the two-years-old birds do so. The older ones stay there during the whole year. 10,070 readings of rings show the age-structure (fig. 8). The longevity record of the Jackdaw in South West Thuringia is 15 years and four months.

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...