Plain, olive or grey-brown warbler, with the long, sloping forehead and ‘linear’ look of the typical Acrocephalus warbler; short, diffuse buff-brown supercilium, not very visible behind eye; fresh plumage is olive brown above, pale below, with buff washed flanks, breast, vent; worn plumage is olive grey above, whiter below,
with grey wash; usually solitary; moves inconspicuously through undergrowth, bushes and trees; often flicks, flares tail.