Eastern Yellow Wagtail

The eastern yellow wagtail (Motacilla tschutschensis) is a small passerine in the wagtail family Motacillidae, which also includes the pipits and longclaws. It was formerly usually classified as a subspecies of the western yellow wagtail, but was split from it in 2003 when genetic data showed this classification to be paraphyletic with respect to the citrine wagtail. It breeds in the eastern Palearctic and Alaska and migrates to South Asia and Australia. == Taxonomy == The eastern yellow wagtail was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's Systema Naturae. He placed it with the wagtails in the genus Motacilla and coined the binomial name Motacilla tschutschensis. The specific epithet tschutschensis is from the locality, the Chukchi Peninsula is eastern Russia. Gmelin based his account on the "Tchutschi wagtail" that had been described by John Latham in 1783 and by Thomas Pennant in 1785. In his description Pennant wrote "Taken off the Tchutschi coat, with the Streights of Bering, Lat. 66, north". This is almost certainly the bird captured in 1778 during James Cook's third voyage to the Pacific Ocean. The naturalist William Wade Ellis, who accompanied Cook…