La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Breeding bird species of the Somme Estuary and the Authie Estuary (North-West France) (2016)
Auteurs :	Antoine Meirland, Auteur ; Thierry Rigaux, Auteur ; Benjamin Blondel, Auteur
Type de document :	Article
Dans :	Alauda (84(1) 2016)
Article en page(s) :	45-64
Résumé :	Different "schorres" of the Somme and Authie estuaries (Western France) have been studied in order to collect data on their breeding bird species. Among the twenty-five breeding species recorded, the commonest were: Meadow Pipit Anthus pratensis (29% of the records), Yellow Wagtail Motacilla flava (24%), Common Reed Bunting Emberiza schoeniclus (16%), Eurasian Skylark Alauda arvensis (6.9%), Sedge Warbler Acrocephalus schoenobaenus (6%), White Wagtail Motacilla alba (5.5%) and Bluethroat Luscinia svecica (3.8%). Densities were calculated for these species. Important differences have been noted between the two estuaries. Thanks to a special analysis of geolocalized data, the effect of the major landscape features has been studied. The birds nested preferably at an altitude of 5m IGN69 and at a distance between 50 and 100m from a hunting pond. For the Common Reed Bunting, the Sedge Warbler and the Bluethroat the highest level of the "schorres" near dykes was essential. The preference for some habitats was calculated, it was different according species.

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