KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 56. N:0 2. 123 
Fam. Pandionide. 
247. Pandion haliaétus cristatus. Vieir~. — The Osprey. 
Pandion haliaétus: Gyldenstolpe I p. 62; Robinson & Kloss p. 29; Gairdner p. 150. 
f Koh Lak "2 1914. L = 500 mm; W = 470 mm; T= 218 mm; C = 32 mm. — do Koh 
Lak 17/12 1914. L = 530 mm.; W = 461 mm; T = 224 mm. C = 31 mm. — Irides: pale yellow. Bill: 
black (cere = pale blue). Legs: pale bluish grey. 
During my stay in the Siamese Malaya I shot two fine specimens of the eastern 
race of our common Osprey. One of these specimens, both of which were obtained at 
Koh Lak, is a young bird with the crown rather dark-striped; the other one seems to be 
older and has the crown almost white with only a few blackish-brown stripes. 
248. Polioaétus ichtyaétus. Horsr. — The Large Grey-headed Fishing-Eagle. 
Polioaétus ichthyaétus: Oustalet 1899 p. 231; Robinson & Kloss p. 30; Grant p. 113; Bonhote p. 58; Robinson 
II p. 144; Gairdner p. 150. 
o Nong Meh Lua °/g 1914. L = 662 mm; W = 461 mm.; T = 280 mm.; Culmen = 37,5 mm. — 
Trides: yellowish white. Bill: horn coloured (base plumbeous). Legs: whitish grey. 
The Large Grey-headed Fishing-Eagle inhabits such well-wooded tracts where large 
rivers and swamps abound. I found it fairly common on such localities in Northern and 
Central Siam. It is a very clumsy bird which never takes long flights. 
A fine male specimen was obtained at Nong Meh Lua in Upper Siam on the 6th of 
August 1914. 
This specimen differs from the descriptions in the literature, in not having 
the head and neck pure grey. The crown and upper neck is, however, grey but 
distinctly washed with brown; the chin, upper throat and sides of the head are pure grey 
without any brownish tinge. The whole upper plumage, breast and upper abdomen brown, 
the two last-mentioned parts, however, decidedly paler. 
Fam. Falconide. 
249. Circus melanoleucus. Forst. — The Pied Harrier. 
Circus melanoleucus: Williamson I p. 47; Gyldenstolpe III p. 234. 
d Koon Tan 1914. W = 346 mm; T = 215 mm.; C = 16 mm. — @ Koon Tan 1914. W = 332 
mm.; T = 213 mm.; C = 16 mm. 
The Pied Harrier is only to be found in Siam during the cold season, but then it is 
not uncommon on suitable localities. 
It is chiefly seen on moisty and swampy ground, but I also observed it on the large 
grassy plains at Nong Bea in Northwestern Siam and the specimens in my collection were 
both shot along the Meh Tha river in Northern Siam. Occasionally it was also observed 
among the hills of the Koon Tan range. Most common, however, on the great swamps 
