Data from: Interspecific competition promotes habitat and morphological divergence in a secondary contact zone between two hybridizing songbirds

Camille Sottas, Jiri Reif, Lechoslaw Kuczynski, Radka Reifova & Lechosław Kuczyński
Interspecific competition is assumed to play an important role in the ecological differentiation of species and speciation. However, empirical evidence for competition’s role in speciation remains surprisingly scarce. Here we studied the role of interspecific competition in the ecological differentiation and speciation of two closely related songbird species, the Common Nightingale (Luscinia megarhynchos) and the Thrush Nightingale (L. luscinia). Both species are insectivorous and ecologically very similar. They hybridize in a secondary contact zone, which...
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