192 BIRDS OF BRITISH BURMAH. 



white ; head and neck fawn-brown, the nuchal feathers rather darker in the 

 centre ; an occipital crest (1'95 inch long) black, with broad white tips to 

 the feathers ; sides of face pale fawn-colour ; under surface of body buffy 

 white, with a tinge of fawn-colour on the breast, a little deeper on the 

 thighs, some of the flank -feathers brownish; under wing-coverts buffy 

 white; quills brown, the primaries blackish, indistinctly barred with 

 darker brown, not very plain below, where the inner lining of the wing is 

 glossy white ; tail brown, tipped with whitish and crossed with three bands 

 of blackish brown, the subterminal one much the broadest. Total length 

 19-5 inches, wing 11 -2, tail 9, tarsus 3. (Sharpe.} 



I have never met with this species, and I consequently prefer to give 

 Mr. Sharpens description. 



Blyth's Hawk Eagle has been known to occur at Mergui and at Banka- 

 soon in Tenasserim. 



It ranges down the Malay peninsula, and is found in Borneo. 



567. SPIZAETUS LIMNAETUS. 



THE CHANGEABLE HAWK EAGLE. 



Falco limnaeetus, Horsf. Trans. Linn. Soc. xiii. p. 138. Falco caligatus, Raffl. 

 Trans. Linn. Soc. xiii. p. 278. Falco niveus, Temm. PI. Col 127. Limnaetus 

 niveus, Jerd. B. Ind. i. p. 70. Spizaetus caligatus, Hume, Rough Notes, i. 

 p. 198 ; id. Nests and Eggs, p. 37 ; id. S. F. iii. p. 27 ; Armstrong, S. F. iv.-p. 297. 

 Spizaetus limnaetus, Salvad. Ucc. Born. p. 15 ; Sharpe, Cat. Birds B. Mus. i. 

 p. 272; Bl. B. Burm. p. 63; Hume $ Dav. S. F. vi. p. 11. Limnaetus cali- 

 gatus, Gurney, Ibis, 1877, p. 425 ; Hume, S. F. viii. p. 82 ; Bingham, S, F. ix. 

 p. 143 ; Gates, S. F. x. p. 179 ; Kelham, Ibis, 1881, p. 366. 



Description. Male and female. Young bird of the year. The head, neck 

 and the whole lower plumage white, the feathers of the crown brown- 

 shafted ; a few of the feathers of the breast with narrow central dark streaks ; 

 a few brown dashes on the sides of the body ; tibial plumes barred with pale 

 fawn ; wings, tail and upper plumage dark brown ; the quills with a good 

 deal of white at the bases of the inner webs ; the tail barred with five or 

 six bars of darker brown. 



At another stage the lower plumage becomes more streaked and the 

 head is tinged with buff; the thighs are more distinctly barred ; the 

 primaries have some silver-grey on the centre of the outer webs, and the 

 tail-bands are better defined. When older still, the lower plumage is 

 thickly dashed with dark brown, and there is a distinct stripe down the 

 chin and throat ; the thighs and tarsi are very closely and distinctly barred 

 with fulvous ; the head and upper neck are tinged with fulvous and thickly 



