La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Recent data on Common Crane Grus grus migration in Ukraine (1989-1996)
Auteurs :	Valentin Serebryakov, Auteur ; Anatolyi Poluda, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (120(5-6) 1999)
Article en page(s) :	357-361
Résumé :	In the Ukraine phenological studies regarding migration of the Common Crane have been carried out since 1975. Data have been collected for the years 1989 to 1996 by questionaire; 1,000 questionnaires were distributed from spring 1989 to 1996, and from autumn 1989 to 1994. Observations made by the authors were also added. Maps illustrating the timing of migration were drawn up for the beginning of spring (633 data) as well as for the beginning and end of the autumn migration (302 and 259 data respectively). The number of Cranes and the direction of migration are presented and discussed. The latter was 42.8 % North and 21.9% North-East, as shown in earlier research of spring migration; and 51.2% South and 20.8% South-West in the autumn. In 512 observations in spring and 680 observations in autumn, different flight sizes were investigated. The most common flock size was 20 birds in spring and 10-30 individuals in autumn. The main migration routes of Cranes stayed the same in this seven-year period.

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