La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Seasonal variation in the diet of Capercaillie Tetrao urogallus in the West Carpathian Mountains
Auteurs :	Miroslav Saniga, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (123(1) 2002)
Article en page(s) :	25-32
Résumé :	From 1988 - 2000, the diet of the Capercaillie was studied in the mountains of the West Carpathians (the Vel'ka Fatra Mts., Mala Fatra Mts., Nizke Tatry Mts., Starohorske vrchy Mts., and Kremnicke vrchy Mts., Slovakia). In spring (March-May), Capercaillies fed mainly in crowns of trees (94% of food items in March, 78% in April, and 55% in Mary). The birds' diet during this season consisted mainly of Beech Fagus sylvatica buds and Norway spruce Picea abies needles. In summer (June-September), Capercaillies preferred feeding on the ground (82% of food items in June, 99% in July, 96% in August, and 74% in September). Summer diet consisted of 27 to 52 plant species. Animal food was taken accidentally (less than 3%). In autumn (October-November), Capercaillies again fed mainly in crowns of trees (58% of food items in October, 70% in November). Winter diet (December-February) consisted almost exclusively of Norway spruce needles (91% in December and 86% in January). The species-specific diet composition of the Capercaillie over the course of the year depended mainly on the spatio-temporal distribution of the vegetation in the local habitat.

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