Specific status of taxa within the Greenish Warbler complex
@article{Collinson2003SpecificSO, title={Specific status of taxa within the Greenish Warbler complex}, author={Martin Collinson and Alan Glasgow Knox and David T. Parkin and George Sangster}, journal={British Birds}, year={2003}, volume={96}, pages={327-331} }
The taxonomic status of six subspecies of Greenish Warbler Phylloscopus trochiloides was re-examined in the light of fresh evidence about their identification characters and biological relationships.Although P. t. viridanus and P. t. plumbeitarsus (‘Two-barred Greenish Warbler’) behave as distinct species in their zone of overlap, the five subspecies viridanus, ludlowi, trochiloides, obscuratus and plumbeitarsus form a cline within which it is not possible to define species boundaries.There is…
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Species boundaries in the Herring and Lesser Black-backed Gull complex
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