Is a new Old World warbler better than an old New World warbler? You be the judge! A new species, dubbed the Limestone Leaf-warbler (Phylloscopus calciatilis), has been discovered in the karst limestone regions of Vietnam and Laos. As ever, BirdLife International has the scoop.

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Written by Mike
Mike is a leading authority in the field of standardized test preparation, but he's also a traveler who fully expects to see every bird in the world. Besides founding 10,000 Birds in 2003, Mike has also created a number of other entertaining but now extirpated nature blog resources, particularly the Nature Blog Network and I and the Bird.