La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Changes in distribution and numbers of the breeding population of the Common Crane Grus grus in Estonia
Auteurs :	A. Leito, Auteur ; J. Truu, Auteur ; A. Leivits, Auteur ; I. Ojaste, Auteur
Type de document :	Article
Dans :	Ornis Fennica (80(4) 2003)
Article en page(s) :	159-171
Langues:	Anglais
Résumé :	The aim of this study is to analyse population trends and distribution of the breeding population of the Common Crane in Estonia. The population size and density of the Common Crane in Estonia has increased several times over the last 30 years (19702001). According to the most recent population estimate, about 5800 pairs were breeding in Estonia in 1999. The mean population density of the Common Crane in Estonia was 17.4 pairs/100 km(2). Most of the Common Cranes are nesting in mires (5300 pairs, 91%), primarily in fens (4200 pairs, 72%). The mean population density in fens, transition mires and raised bogs was 41.3, 38.3 and 15.9 pairs/100 km(2), respectively. Several factors have probably contributed to the recent increase in the Common Crane breeding population in Estonia, e.g. the emergence of new nesting sites connected to human activity, locally higher spring temperatures and conservation activities.

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