La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Gull attacks on long-distance migrating birds
Auteurs :	Dejan Bordjan, Auteur ; Ivan Kljun, Auteur
Type de document :	Article
Dans :	Preprints (No number February, 2018)
Article en page(s) :	5
Mots-clés:	Montenegro
Résumé :	The migration poses a high risk for the birds while especially demanding for land birds are crossings over large bodies of water. One of the dangers faced by migrants are opportunistic predators like Gulls. The Larus Gulls are generalist predators with omnivorous diet which typically make use of a variety of different food sources. Predation on migrating birds has been surveyed at Ada Island (S Montenegro) in the period 17.3.-10. 4. 2015. We encountered 20 attacks on 22 individuals of six species and one unidentified Passerine. In four instances Gulls attacked Birds of prey, in two, Hoopoe Upupa epops and in 16, Passerines. Except for two cases when a pair was attacked, Gulls attacked individuals migrating singly. Considering our data around one percent of Passerines migrating during the day over the lower Adriatic Sea can expect an attack from the Gulls, and this percent can be as high as 9.5 % for Passerines migrating singly. The most susceptible species were those that migrated singly and are not adapt flyers like Robin Erithacus rubecula.
En ligne :	https://www.researchgate.net/publication/324154060_Gull_attacks_on_long-distance_migrating_birds

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