Helopsaltes is a genus of passerine birds in the grassbird family Locustellidae.

Pallas's grasshopper warbler (Helopsaltes certhiola), also known as the rusty-rumped warbler, is an Old World warbler in the grass warbler genus Helopsaltes, the family Locustellidae.

1/ Pallas's grasshopper warbler (Chích đầm lầy lớn, Helopsaltes certhiola)

Locustellidae, Locustella is from Latin and is a diminutive of locusta, "grasshopper".
The genus name Helopsaltes combines the Ancient Greek helos meaning "marshy ground" and psaltis "a chanter".