Ornithology of Northern Bur)teo. 73 



streaks on the cliest evidently become gradually broken up 

 into bars, a[)parently as much by a change of the pattern of 

 the feather as by a moult. The young feathers before the 

 commencement of the moult show a certain amount of change 

 in the shape of a disruption of the central streaky indicative 

 of the forthcoming banded stage. 



[I have observed this species in various parts of Northern 

 Borneo between the end of October and the end of March, 

 and it is evidently only a migrant of the N.E. monsoon. 

 During my ascent of Kina Balu I found it as high as 1000 

 feet. It is generally met with in open places. A young 

 male had the iris yellowish olive^ the feet and cere dull 

 yellow.] 



12. Haliaetus leucogaster. 



Haliaetus leucogaster (Gm.) ; Sharpe, Cat. B. i. p. 307 

 (1874) ; id. Ibis, 1877, p. 3; id. P. Z. S. 1879, p. 323; id. 

 Ibis, 1879, p. 23G. 



Cuncuma leucogaster, Salvad. Ucc. Born. p. 5. 



a. ? ad. Abai, Borneo, Dec. 23, 1887. 



b. ^ juv. Abai, Feb. 26, 1886. 



c. ? juv. Abai, March 10, 1886. 



d. J ad. Abai, March 11, 1886. 



e. ? ad. Taguso, Palawan, Aug. 12, 1887. 



[Iris hazel ; feet dirty white ; skin on face French-blue, 

 Plentiful all round the coast of Borneo, but rarer in Pa- 

 lawan. I found a nest on the 12th of April with nearly- 

 Hedged young. The nest was on a dead tree in a forest 

 which had been recently burnt. The nestlings were beautifully 

 speckled, much more so than in the full-grown young birds 

 which were afterwards procured. The nest was full of the 

 remains of sea-snakes, on which this Eagle frequently feeds. 

 One of my specimens is stained on the breast with the ink 

 of the cuttle-fish, which, according to the natives, is also a 

 favourite food of this species.] 



13. POLIOAETUS ICHTHYAETUS. 



FoUoaetus ichthyaetus (Horsf.) ; Sharpe, Cat. B, i. p. 452 ; 

 Salvad. Ucc. Born. p. 6. 



