(1264) Aethopyga siparaja viridicauda.
The Yunnan Yellow-backed Sunbird.
Aethopyga seheriae viridicauda Rothschild, Nov. Zool., 1921, p. 58 (Tengueh, Yunnan).
Vernacular names. None recorded.
Description. This race differs from AE. s. seheriae only in being duller and more grey on the abdomen. Further material may show that it cannot be maintained.
Colours of soft parts as in the other races.
Measurements. Wing 56 to 57 mm.; tail 59 to 67 mm.; tarsus about 14 mm.; culmen 17 to 18 mm.;
Distribution. Yunnan. A specimen from Maymyo in the Shan. States is also referred by Rothschild to this form.
Habits. Forrest obtained this Sunbird at Tengueh, Yunnan, at between 5,000 and 6,000 feet in open scrub. They were killed in June.