Data from: Dramatic niche shifts and morphological change in two insular bird species

Per Alström, Jon Fjeldså, Knud Andreas Jønsson, Anders Ödeen, Per G. P. Ericson, Martin Irestedt, J. Fjeldsa, K. A. Jonsson, P. Alstrom & A. Odeen
Colonizations of islands are often associated with rapid morphological divergence. We present two previously unrecognized cases of dramatic morphological change and niche shifts in connection with colonization of tropical forest-covered islands. These evolutionary changes have concealed the fact that the passerine birds madanga, Madanga ruficollis, from Buru, Indonesia, and São Tomé shorttail, Amaurocichla bocagii, from São Tomé, Gulf of Guinea, are forest-adapted members of the family Motacillidae (pipits and wagtails). We show that Madanga has...
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