Chatarrhaea longirostris
Habitat
Seasonally wet or flooded lowland grassland in subtropical or tropical areas
Range
Bangladesh, Nepal and north-east India, and possibly Myanmar
The slender-billed babbler, Argya longirostris, was described by Frederic Moore in 1854 and belongs to the family Leiothrichidae. A 2018 molecular study moved it from Turdoides to the resurrected genus Argya (Wikipedia, general species account).
It lives in seasonally wet or flooded lowland grassland in Bangladesh, Nepal and north-east India, and possibly Myanmar. The source gives no size, appearance, diet, behaviour or breeding detail (Wikipedia, general species account).