Middendorff's Grasshopper Warbler Helopsaltes ochotensis

Like most other members of its genus, this songbird can be excruciatingly difficult to see in the dense forest edge growth or wetlands it prefers. Brown with a pale supercilium and belly, faint streaking on the crown and back, and a rufous burnish to the rump and upper tail. Very similar to Pleske's and Gray's Grasshopper-Warblers but has a more contrasting brow and belly than those two and is substantially smaller than the latter. Song is dry and rattling, comprised of a series of double notes followed by longer, more mellow-sounding ones. Calls are similarly dry and short.