La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Foraging and chick-provisioning ecology of Roseate Terns breeding at Rockabill, in Ireland (2019)
Auteurs :	Martin Perrow, Auteur ; Andrew Harwood, Auteur ; Richard Berridge, Auteur ; Brian Burke, Auteur ; Stephen Newton, Auteur ; Daniel Piec, Auteur
Type de document :	Article
Dans :	British Birds (112(9) SEP 2019)
Article en page(s) :	496-516
Résumé :	Rockabill, in Co. Dublin, supports the most important colony of Roseate Terns Sterna dougallii in Europe, testament to intense conservation effort over the last 30 years. This paper describes the first boat-based visual tracking of Roseate Terns from Rockabill and relates this to observations of chick provisioning at the colony. Roseate Terns are capable of rapid flight and routinely forage up to 30 km from the colony. Characteristic 'power diving' from a relatively low height allows birds to reach greater depths than similar-sized terns, offering a competitive advantage, especially in deep, clear, oceanic waters. Birds are drawn to foraging auks, which bring schooling 'bait fish' to the surface, but Roseates seem to be outcompeted by other seabirds, especially Common Terns S. hirundo, in the ensuing melee and may be more successful foraging alone. Adult Roseates from Rockabill fed mainly on small fish (

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