New rare bird species discovered in Japan

A previously unknown species of leaf warbler has been discovered in Japan. The Ijima's Leaf Warbler has proven to be two different species, not just one. Every year, a few new bird species are identified around the world. The unusual aspect in this case is that it is not primarily the appearance that reveals that two species are involved—it is above all DNA analyses that prove it. The findings are published in the journal PNAS Nexus.