La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Roosting behaviour of wintering Eurasian Bitterns in the Lee Valley
Auteurs :	Alan Harris, Auteur
Type de document :	Article
Dans :	British Birds (99(4) APR 2006)
Article en page(s) :	174-182
Résumé :	In the Lee Valley, Eurasian Bitterns Botaurus stellaris leave their foraging sites and go to roost late in the day, usually after sunset. The distance travelled is often only a few metres (accomplished on foot) and for around two-thirds of the birds in the study area the roost site is in the same reedbed in which they forage. Consequently, travelling time and distance are minimal. They roost high up in the reeds, standing on a sheaf of reed stems all night, and leave the roost usually before sunrise to travel back to the foraging site, again mostly on foot. Some roosts contain more than one bird. Those Bitterns leaving the roost-site reedbed to forage elsewhere also normally leave before sunrise and return after sunset.

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