La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Differences between social and non-social hunting of juvenile Montagu's Harriers Circus pygargus in the post-fledging dependence period.
Auteurs :	Ignacy Kitovski, Auteur
Type de document :	Article
Dans :	Ornithologischer Anzeiger (42(2) Mai 2003)
Article en page(s) :	147-152
Résumé :	Social and non-social hunting of juveniles of Montagu's Harrier Circits pygaigiis during a post-fledging period was observed in southeast Poland. Social hunting sessions were of imitative character since no form of cooperation between juveniles was observed. Social hunting was found to be more effective (8.3%) as compared to non-social (5.3%) of lone individuals but the difference fell into the range of statistical insignificance. During both social and non-social hunting the juveniles caught Green Grasshoppers Tettigonia viridissima, a certain number of which was eaten mid-air. For social hunting the fledglings preferred fields covered with oat and laid down wheat, while lone birds prefered areas covered with laid-down wheat only.

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