An odd, thrush-like warbler; extremely shy and seldom seen as it lurks about in dense undergrowth. The largest grasshopper-warbler, with a distinctly robust appearance. Matte brown with pale brow, throat, and belly. Complete lack of streaking distinguishes this species from Middendorff’s and Pallas’s grasshopper-warblers; white throat and pale brow distinguish Gray’s from the much browner Pleske’s Warbler. Slightly warmer-colored Sakhalin Grasshopper-Warbler is extremely similar but has a whiter throat, a thicker brow, and more extensive brown on the underside.