128 NILS GYLDENSTOLPE, ZOOLOGICAL RESULTS OF THE SWEDISH ZOOLOGICAL EXPEDITIONS TO SIAM. 
o Koon Tan 5/5 1914. L = 640 mm.; T = 457 mm.; W = 300 mm.; Culmen from cere = 33 mm. 
— Irides: yellow. Bill: horn colour with the base plumbeous. Legs: yellow. 
The Crested Serpent Eagle was comparatively common in the Northern parts of 
the country where it inhabits the deciduous forests or the pine forests on the slopes of the 
higher hills. They have a very characteristic and easily recognised mewing call which 
they frequently utter when circling high up in the sky. 
260. Spilornis bacha. Daun. 
Spilornis bacha; Grant p. 114. 
Spilornis cheela: Bonhote p. 57. 
do Hue Sai '%/: 1915. L = 615 mm.; W = 401 mm.; T = 250 mm.; C = 32 mm. — Irides: yellow. 
Bill: horny plumbeous. Jegs: yellow. 
Comparatively rare and only observed in the Siamese Malaya. Only two speci- 
mens were identified with any certainty: one was obtained and the other one was severly 
wounded, though I could not find it. This species was found in the country between the 
coast and the Tenasserim mountains. That country is densely covered with bamboo- or 
secondary jungles with some higher trees among the bamboos. Here and there old or 
new clearings or a few small paddy-fields occur and such places seems to be favourite hunt- 
ing-grounds for this beautiful Serpent Eagle. 
261. Haliaétus leucogaster. Gm. — The White-bellied Sea-Eagle. 
Haliaétus leucogaster: Robinson & Kloss p. 23; Robinson II p. 144. 
Cuncuma leucogaster: Miller p. 428. 
A pair of the White-bellied Sea-Eagle were breeding in a low tree on an inaccessible 
limestone cliff north of the village of Koh Lak. Though I made several efforts to get 
one of these fine Eagles, I was always unfortunate. 
The food of this species seems chiefly to consist of sea-snakes which abound in the 
Gulf of Siam, and I several times saw the birds returning from their haunts in the Bay 
with a sea-snake in their claws. They are generally out in search of prey early in the 
morning and in the afternoon just before dusk. 
262, Haliastur indus. Bopp. — The Brahminy Kite. 
Haliastur indus: Gyldenstolpe I p. 63; Williamson I p. 47; Flower p. 327; Gairdner p. 32; Gould p. 151; 
Schomburgk p. 246; Miller p. 428; Oustalet 1899 p. 239; Gairdner p. 151. 
d Nong Meh Lua %g 1914. L = 440 mm.; W = 355 mm.; T = 199 mm.; C = 23 mm. — Irides: 
brownish yellow. Bill: yellowish green. Legs: yellow. 
The typical race of the Brahminy Kite inhabits the Northern parts of the country. 
In Central Siam the two races are probably mixed up together, but in the Siamese Malaya 
it is only represented by the southern form. 
