Martens's Warbler

Martens's warbler (Phylloscopus omeiensis), also known as Omei warbler or Emei Shan warbler, is a species of Old World warbler in the family Phylloscopidae (or Sylviidae). It was first described in 1999. It is found in China and Myanmar. Its natural habitats are temperate forests and subtropical or tropical moist montane forests. Martens's warbler was initially placed in the genus Seicercus. (Wikipedia, general species account).

A molecular phylogenetic study published in 2018 found that neither Phylloscopus nor Seicercus were monophyletic. In the subsequent reorganization the two genera were merged into Phylloscopus which has priority under the rules of the International Commission on Zoological Nomenclature. This species belongs to a group of small, active songbirds that generally search foliage, stems or ground cover for insects and other small invertebrates. Many are easier to detect by voice than by sight, particularly in dense vegetation, and closely related forms may require calls, season and range for confident identification. These are group-level ecological notes, not Vietnam-specific breeding measurements (general warbler ecology).