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) blacky with broad white tips to 
the feathers ; sides of face pale fawn-colour ; under surface of body buffy 
whitCj 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. 
BlytVs Hawk Eagle has been known to occur at Mergai 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, Ilorsf. Trans. Linn. Soc. xiii. p. 138. Falco caligatus, Baji. 
Trans. Linn. Soc. xiii. p. 278. Falco niveus, Te?nm. 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 8f Dav. S. F. vi. p. 11. Limnaetus cali- 
gatus, Gurney, Ibis, 1877, p. 425 ; Hume, S. F. yiii. p. 82 ; Bingham, S. F. ix. 
p. 143 ; Oates, S. F. x. p. 179 ; Kelham, Ibis, 1881, p. 306. 
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 j 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 buflP ; 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 
