The Long-billed Bush-Warbler was described as a pale-brown bird with a monotonous song. In June 2022 it was observed along grassy terraces in Naltar Valley, northern Pakistan.
The birds observed in Naltar Valley were pale brown. The account notes differences between two birds in their supercilium, throat spotting, and lower-bill color.
The author recorded birds singing from vegetation bordering terraced fields and feeding along the field edges early in the morning.
An extinction-risk assessment has not been added yet.