Data from: Competition-driven build-up of habitat isolation and selection favouring dispersal modification in a young avian hybrid zone

Jakub Rybinski, Päivi M. Sirkiä, S. Eryn McFarlane, Niclas Vallin, David Wheatcroft, Murielle Ålund & Anna Qvarnström
Competition-driven evolution of habitat isolation is an important mechanism of ecological speciation but empirical support for this process is often indirect. We examined how an on-going displacement of pied flycatchers from their preferred breeding habitat by collared flycatchers in a young secondary contact zone is associated with (a) access to an important food resource (caterpillar larvae), (b) immigration of pied flycatchers in relation to habitat quality, and (c) the risk of hybridization in relation to...
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