The plain prinia (Prinia inornata) is a small passerine bird native to the Indian subcontinent and Southeast Asia. It is a member of the family Cisticolidae, which also includes warblers, cisticolas, and grassbirds. The plain prinia is a drab-looking bird, with a plain brown upper body and a pale gray underbody. It has a long, slender tail that it often flicks up and down. The plain prinia is a common bird in open habitats, such as grasslands, scrublands, and agricultural fields. It is an insectivore, and its diet consists mainly of insects and other small invertebrates.
The plain prinia is a territorial bird, and it will defend its territory aggressively from other birds. It is also a vocal bird, and its song is a high-pitched, warbling sound. The plain prinia is a common bird in its range, and it is not considered to be threatened or endangered.