Birds of a feather winter together: migratory connectivity in the Reed Warbler Acrocephalus scirpaceus

摘要: To investigate migratory connectivity in the Reed Warbler Acrocephalus scirpaceus, we analysed (1) all available sub-Saharan ringing recoveries and (2) stable isotopes feathers grown Africa sampled at 17 European breeding sites across a divide. A cluster analysis of showed remarkable between non-breeding grounds. Two main clusters represented populations taking two routes [southwesterly (SW) southeasterly (SE)]. Stable isotope confirmed separation wintering areas SW- SE-migrating populations. Higher δ15N values birds indicated that they occupied more xeric biome types. Values δ13C did not differ significantly among were higher than those from known origin C4 biome. Three with an unknown direction assigned to on basis values.