No Jayan, it is a Blyth's Reed Warbler as Valery correctly advised above. Your bird has long undertail coverts, rounded tail, short 1st primary and a brown iris which confirm it as an Acrocephalus warbler rather than an Iduna warbler. Blyth's Reed is confirmed by narrow, pale supercilium extending beyond eye, uniform plumage (lacking dark centers to tertials), emarginations to 3rd and 4th primaries and medium length primary projection.
Hello Valery, I thought that the supercilium extend behind the eye and the head was round.
Hy Jayan. I've spent weeks in Kerala and neighbouring states. Blyth's Reed-Warbler is common and I've check hundreds of them, in hope of other species. This is how I realized the species looks variable. It can depend on light and the environment as well as real individual variations. Colour, supercilium, head shape, bill width... the voice is really helpful. It calls a lot, not to say all the time...
