(2267) Anas poecilorhyncha haringtoni.
The Burmese Grey Duck.
Polionetta haringtoni Oates, Jour. Bom. Nat. Hist. Soc, xvii, p. 558 (1907) (Shan States).
Vernacular names. Bor-mughi-hans (Assam), Vum-be, Taw-be (Burma).
Description. Differs from the Indian Grey Duck in having no red spots on the base of the bill, or only very faint traces of them; the speculum is green as in that bird but the underparts are less spotted and generally paler.
Colours of soft parts as in the Eastern race.
Measurements. Wing, 245 to 268 mm., 237 to 258 mm.; culmen 49 to 57 mm.
Distribution. The whole of Burma, including Shan States, Chin Hills etc.; Yunnan, Cochin China and the extreme East of Assam. Stevens obtained many of these ducks in North Lakhimpur; Moore and Mundy got several in Dibrugarh each year from 1902 to 1905. I obtained my first specimens in the same-district in 1903 and others each year subsequently until I left.
Nidification. Two nests taken in Dibrugarh were built in among scrub-jungle on the borders of a swamp ; one, found on the 6th of February, containing three fresh eggs and one, taken on the 13th of April, a single fresh egg. Harington found this duck breeding in the Southern Shan States in the middle of June. The eggs are like those of the Mallard, a very pale dull buff,, seven of them averaging in size 55.9 x 39.8 mm.
In the nest found in February there was a little down as lining,, the nest itself being of grass and reeds and well made. In the other nests there was no down at all.
Habits. Similar to those of the Indian Grey Duck.