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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Seasonal and spatial variation of the Montagu’s Harrier’s Circus pygargus diet in Eastern Poland (2016)
Auteurs :	Paweł Mirski, Auteur ; Dominik Krupiński, Auteur ; Krzysztof Szulak, Auteur ; Michał Żmihorski, Auteur
Type de document :	Article
Dans :	Bird Study (63(2) avril 2, 2016)
Article en page(s) :	165-171
Résumé :	Capsule: The diet of the Montagu’s Harrier Circus pygargus is variable and comprises the most available prey at a given time of the season. We found no evidence for a relationship between diet and land-use in the core foraging zone.Aims: We investigated whether the diet of the Montagu’s Harrier reflects the available prey and how it changes across the breeding season and in relation to land-use.Methods: We analysed pellets collected at nests between 2007 and 2011. We looked for nonlinear patterns in the occurrence of prey categories in the pellets as a nonlinear function of the Julian date. Moreover, we tested whether the diet is affected by land-use within a radius of 2299 m from the nest.Results: Four thousand four hundred and sixty-five prey items were found in 880 pellets and 76 prey remains collected at 63 sites. The diet did not depend on the land-use structure but showed a significant temporal variation.Conclusions: The diet of the Montagu’s Harrier follows the availability of the prey in the foraging habitat. We conclude that the type of land-use in the vicinity of the nesting habitat has a rather weak effect on the diet of the Montagu’s Harrier.
En ligne :	http://www.tandfonline.com/doi/full/10.1080/00063657.2016.1143914

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