The Slender-billed Babbler has a rufous-brown back and a slender, slightly down-curved bill. It hides in seasonally wet grassland and searches the ground for insects.
The upperparts are rufous-brown, the bill is slender and slightly down-curved, and the throat is pale.
It hides among grass and reeds in seasonally wet lowland grassland and feeds on the ground; it is solitary or paired in the breeding season and gregarious at other times.
An extinction-risk assessment has not been added yet.