(1767) Spilornis cheela burmanicus.
THE BURMESE C RESTED SERPENT-EAGLE.
Spilornis cheela burmanicus Kirke-Swann, Synopsis Accip., 2nd ed. p. 81 (1920) (Thyetmyo, Burma). Spilornis cheela. Blanf. & Oates, iii, p. 357 (part.).
Vernacular names. Doun-zoon, Lin-yen (Burmese); Sin (Assam).
Description. A rather smaller, paler race than typical cheela ; the white spots on the lower plumage are larger and more conspicuous, the black adjoining spots are paler and less conspicuous; the terminal black band on the primaries is not quite so broad.
Colours of soft parts the same in all races.
Measurements. Wing 408 to 463 mm.*
Distribution. Burma, South to Tavoy, North to Shan States, Ruby Mines District, Chin Hills and Assam South of the Brahmapootra. Hume identified this form with the similar but much smaller Hainan race rutherfordi, which does not occur within our limits.
Nidification. Harington obtained a nest of this species with one egg on the 26th March, built high up against the trunk of a big tree in dense forest; Hopwood took another on the 14th February in the Lower Chindwin; Bingham took an egg in Tenasserim in March; a fourth egg was taken by myself in Silchar in May. These four eggs measure 67.9 x 58.2, 73.1 x 56.0, 69.3 x 57.1 and 66.3 x 54.0 mm. One egg is white with a little stippling of light, red at the larger end, the second is lightly clouded and blotched with pale purple-red at this end and the others are handsomely marked all over with dark red.
Habits. Exactly the same as those of the typical form.
* Possibly the bigger birds are wandering specimens of S. o. cheela, as there are very few over 450 mm. and these from, the Western area only.