Clamorous Reed Warbler is a large Song Thrush-sized warbler at 18 to 20 cm. The adult has an unstreaked brown back and whitish underparts. The forehead is flattened, and the bill is strong and pointed. The sexes are identical, as with most warblers. It is very like Great Reed Warbler, but that species has richer coloured underparts. Races differ in plumage. The migratory northern race has the richest brown upperparts, while the endemic Sri Lanka subspecies is the darkest form.
Habitat and Distribution
It breeds from Egypt eastwards through Pakistan, Afghanistan and northernmost India to south China, southeast Asia and south to Australia. There is also an endemic race in Sri Lanka.Most populations are sedentary, but the breeding birds in Pakistan, Afghanistan and north India are migratory, wintering in peninsular India and Sri Lanka. Clamorous Reed Warblers are found in large reed beds, often with some bushes.
Like most warblers, Clamorous Reed Warbler is insectivorous, but will take other small prey items.
The Clamorous Reed Warbler lays 3-6 eggs in a basket nest in reeds.
Calls and Songs
The song is loud and far carrying. It is a slow chattering kereet-kereet-kereet with typically acrocephaline whistles and mimicry added.