(801) Acrocephalus concinens concinens.
The Chinese Paddy-field Warbler.
Calamoherpe concinens Swinh., P. Z. S., 1870, p. 432 (Pekin)
Vernacular names. None recorded.
Description. Similar to A. agricolus in colour but, season for season, rather darker and browner above and considerably darker and much more fulvous below. The wing-formula is always sufficient to separate it from that bird.
Like all subspecies of agricolus and concinens the plumage is much paler and whiter below in the Winter than when breeding.
The second primary is generally equal to the ninth, often to the tenth.
Colours of soft parts. Iris olive-brown to hazel-brown ; upper mandible brownish black, lower mandible pale horny flesh-colour with dark tip; legs and feet light brown or fleshy-brown.
Measurements. Total length about 130 mm.; wing 52 to 57 mm.; tail 54 to 58 mm.; tarsus about 20 mm.; culmen about 11to 12 mm.
Distribution. Breeding in the hills of North and Central China to the Himalayas as far West as Gilgit. In Winter to South China, Indo-Chinese countries, Burma and Eastern India.
Nidification. The Chinese Paddy-field Warbler breeds in Kashmir in some numbers, but hitherto very few nests have been taken, as it has been sought for in reed-beds and swampy places, whereas it actually breeds in rose-bushes on hill-sides far from water. The nest is the usual deep cup and the only eggs I have seen were like those of the Paddy-field Warbler. They were laid in June.
Habits. This is said to be a noisy, cheerful little bird, much like other small Reed-Warblers. Rickett, Sty an and La Touche all describe it as haunting reed-beds and marshy places in China as well as hill-sides covered with scrub and bush-jungle. In India during the Winter it is found in the former kind of country, but in the Summer forsakes them for hill-sides far from water.