English: Common Grasshopper Warbler, Pale Grasshopper-warbler
Russian: Обыкновенный сверчок          
Mongolian: Эгэл шатансүүлт     
German: Feldschwirl
French: Locustelle tachetee
Japanese: ヤチセンニュウ (Yachi-sennyu)   

Body length:   12 ½ - 13 ½ cm.

Breeds in habitats with low, thick vegetation, often in tussocky marshland beside lakes (where tussocks tallest), in young conifer plantations or clear-felled areas, among tall grass and herbage with scattered bushes, often along riversides. Summer visitor (in Britain & Ireland May-Jul), winters so far as known in tropical Africa. Except when singing, very hard to see; keeps well concealed and creeps in grass like a mouse. Nests low in dense vegetation.

Identification: A Sedge Warbler-sized, grey-brown bird with no striking plumage features. Dark-spotted above on olive-tinged grey-brown ground; off-white or sometimes warmer buffy yellow-white below, unspotted or with variable amount of small dark spots only on throat and upper breast (many have a few spots only; rarely, showing dense heavy spotting, and in addition some diffuse streaking on flanks, producing similarity to Lanceolated Warbler, which see). Distinguished from Sedge Warbler by: lack of prominent, diffusely streaked undertail-coverts; olive-tinged grey-brown and weakly dark-spotted rump not contrasting appreciably with back; evenly fine-streaked crown without darker sides. Legs pinkish, bill rather dark. Tertials dark, with bases broadly and diffusely edged brown. Sexes alike. In autumn, juveniles are often yellowish below while adults are off-white, although there seems to be a certain overlap as to this.