Breeding biology of Marsh Warblers Acrocephalus palustris in Worcestershire: a comparison with European populations

摘要: Various parameters of breeding biology are compared for Marsh Warbler populations in Britain and Europe. Laying date was later mean clutch size lower Worcestershire, formerly the main area species Britain. Overall productivity Worcestershire than central BTO Nest Record Card data suggested that has not shown any decline recent years, so cannot be explained by lowered reproductive performance.