Nesting and Foraging Characteristics of Aquatic WarblersAcrocephalus paludicolain the Fast Declining Pomeranian Population (NE Germany/ NW Poland)

摘要: Limited food availability could be a cause for the strong decline of small and isolated Aquatic Warbler pop- ulation in Pomerania (NE Germany/NW Poland). In this paper, we describe nesting site conditions, nest placement female foraging behaviour as well supply vegetation types prevailing Pomeranian breeding areas. Female Warblers appeared to select 'managed' sites (where land use maintains suitable conditions Warbler) nesting, preferred vertical structures (ditches edges within sites) foraging. They flew longer distances provisioning their nestlings than core population (E Poland, Belarus) whereas total distance travelled per 30 minutes was similar. sites, invertebrate biomass larger 'unmanaged' early June when broods are raised. able exploit relative- ly rich sources meadows may thus balance higher efforts flights Eastern Poland Belarus. To increase Pomerania, management by mowing should continued. It might yield best results providing mosaic patches.