Locustella lanceolata
Family: Grasshopper Warblers, Grassbirds, and Allies · Status: Uncommon migrant · Size: 12–13.5 cm · Conservation: Least Concern
Breeds across Siberia, northern China, Japan and Korea; winters to the Indian subcontinent and Southeast Asia.
Smaller than Pallas's Grasshopper Warbler, with prominent streaking on crown, mantle, rump, lower throat, breast, flanks and undertail-coverts, and lacks the pronounced rufescent plumage tones. Juvenile somewhat less heavily streaked.
Grass, weeds and scrub.
Very skulking; forages on or near the ground and is difficult to flush.