Sakhalin grasshopper warbler
{{Short description|Species of bird}}
{{More citations needed|date=February 2022}}
{{Speciesbox
| image = Locustella fasciolata hokkaido japan.jpg
| image_caption = from Hokkaido, Japan
| status = LC
| status_system = IUCN3.1
| status_ref = {{cite iucn |publisher=IUCN |title=Helopsaltes amnicola |author=BirdLife International |year=2016 |volume=2016 |page=e.T22734059A104196540 |doi=10.2305/IUCN.UK.2016-3.RLTS.T22734059A104196540.en |url=https://www.iucnredlist.org/species/22734059/104196540}}
| genus = Helopsaltes
| species = amnicola
| authority = (Stepanyan, 1972)
| synonyms = Locustella amnicola
}}
Sakhalin grasshopper warbler (Helopsaltes amnicola), is a species of bird in the family Locustellidae; it was formerly included in the "Old World warbler" assemblage.
Distribution and habitat
This small passerine bird breeds on Sakhalin, the southern Kuril Islands and Hokkaido. It is a species found in lowland and coastal regions, nesting in forests or thickets.
Description
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.