(334) Siva strigula castaneicauda.
Siva castaneicauda Hume, S. F., v. p. 100 (1877) (Muleyit) ; Blanf. & Oates, i, p. 209.
Vernacular names. None recorded.
Description. Differs from the last bird in the much greater extent of red on the tail; the sides of the head are blackish and the ring of yellow round the eye brighter and more conspicuous.
Colours of soft parts. Iris deep brown; upper mandible brown, lower fleshy; legs and feet dingy glaucous-blue.
Measurements as in the last. I cannot And that the average size of the bill is any bigger. Oates says that the bill is much larger but gives no details.
Distribution. The whole of Burma, throughout the hills from Tenasserim to the Chin and Kachin Hills and Siam.
It is extremely difficult to define the limits of these two races. Birds from the extreme South and East of Burma are quite different from those of the Western Himalayas to Sikkim, but birds from Assam to W. Central Burma are intermediate, having the sides of the head little darker than in typical strigula, yet with nearly as much red on the tail as castaneicauda; the Chin Hills birds are a step nearer the latter, whilst those from Yunnan, the Shan States and all Eastern and Southern Burma are practically identical with that form.
Nidification and Habits as far as is known like those of the last bird. A single egg taken by Mr. W. A. T. Kellow measures 18.4 x 15.6 mm.