Programme de baguage PHENO au sein des marais de Gannedel

Found in the south-west of the Ille-et-Vilaine department, the Gannedel marsh is the department’s largest inland marsh (about 500 ha).  Its position and its extent make it the most important natural marshland area on a north/south axis, from the bay of Mont-Saint-Michel, for the birds that decide to cut through Brittany by the “shortest route”. The PHENO programme, proposed by Julien Mérot, aims at characterising and quantifying the migratory phenology of the common sparrows in France over the long term. The date on which the individuals leave their reproduction places to go back to their wintering area (or conversely) indeed depends on features intrinsic to the individuals (species, sex, age, original population, bodily condition) and also on the environmental constraints that they encounter (climate, habitat productivity, or disturbance from human sources).