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1 June 2008 Syntopic Taxa in the Sylvia cantillans Species Complex
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Abstract

Distributional relationships among closely related taxa can provide key information about the levels of their reproductive isolation or compatibility, and thus the stage of speciation process. Here, we present new information on the sites where two taxa traditionally considered as subspecies of the Subalpine Warbler Sylvia cantillans, S. c. cantillans and S. (c.) moltonii, breed sympatrically in mainland Italy. We analyse geographic distribution and behaviour as well as other characteristics shown by these warblers in the areas of contact. The distributional pattern shown by these taxa, which is partly sympatric with syntopic breeding, and the apparent lack of interbreeding, strongly suggest that they behave as different species, confirming previous findings about genetic divergence and differential song perception.

Mattia Brambilla, Alessio Quaglierini, Fabrizio Reginato, Severino Vitulano, and Franca Guidali "Syntopic Taxa in the Sylvia cantillans Species Complex," Acta Ornithologica 43(2), 217-220, (1 June 2008). https://doi.org/10.3161/000164508X395333
Received: 1 September 2007; Accepted: 1 July 2008; Published: 1 June 2008
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