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Gray's grasshopper warbler
	Illustration by J. G. Keulemans (1881)
Conservation status
	; Least Concern (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Passeriformes
Family:	Locustellidae
Genus:	Helopsaltes
Species:	H. fasciolatus
Binomial name
	Helopsaltes fasciolatus; (G. R. Gray, 1861)
Synonyms
	Locustella fasciolata

Gray's grasshopper warbler (Helopsaltes fasciolatus), also known as Gray's warbler, is a species of grass warbler in the family Locustellidae; it was formerly included in the "Old World warbler" assemblage.

The Sakhalin grasshopper warbler was formerly considered conspecific.

Distribution and habitat

This small passerine bird breeds in southern Siberia, northeastern China and Korea. It is migratory, wintering in southeast Asia. It is a species found in lowland and coastal regions, nesting in forests or thickets.

Description

This is the largest of all the Locustella warblers, approaching the size of the great reed warbler. The adult has an unstreaked olive-brown back, uniformly grey breast and buff underparts, with unmottled dull orange undertail coverts.

The song is a short phrase, loud and distinctive; nothing like the insect-like reeling of European Locustella species, and more musical than that of Pallas's grasshopper warbler.