The above inferences on migration strategies were derived from fattening patterns, but are supported by ring recoveries (Wernham et al. 2002). Some summer migrant species ringed in Britain, such as Eurasian Reed Warbler Acrocephalus scirpaceus, Greater Whitethroat Sylvia communis and Sand Martin Riparia riparia, yield recoveries widely scattered through southern France and Iberia, implying that they stop almost anywhere on their journey towards Africa. In other species, however, the recoveries are heavily concentrated in particular regions, with few or none elsewhere: Pied Flycatchers Ficedula hypoleuca and Tree Pipits Anthus trivialis in western Iberia, Lesser Whitethroats Sylvia curruca in the Alps region of northern Italy, and Wood Warblers Phylloscopus sibilatrix in peninsular Italy. These latter patterns suggest that these species migrate in a single long flight from their breeding areas to specific regions in the southern half of Europe, and from there they may move without other long pauses to sub-Saharan Africa. Their whole journey
% of ring recoveries from northern Europe
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