Striated grassbird 
(Chiền chiện lớn, Megalurus palustris) 
The striated grassbird (Megalurus palustris) is a warbler species in the family Locustellidae, formerly placed in the family Sylviidae, is now the only species placed in the genus Megalurus.
The bird is found in Bangladesh, Cambodia, China, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Pakistan, the Philippines, Thailand, and Vietnam.

Megalurus
mega- Ancient Greek μέγας (mégas, “great, large, mighty”).
lurus lurus
 straight
 upright
 (figurative) being honest, innocent, guiltless
 parallel

palustris paluster,  palustre (adj.B): inhabiting marshes, bogs, fens;
palustris, is from the Latin word palus, which means of marshes or swamps and refers to its native habitat.