Stuart Baker (3) provides the following detailed description of 
adult males and females: 
Adult Male 
"Head above, neck and upper back grey tinged with russet; purer 
grey around the eye; back, rump and upper tail-coverts grey, the latter 
blackish, each feather pale buff at the base and with a large drop of 
deeper buff at the end; tail-coverts edged with yellow; inner wing- 
coverts and scapulars like the back but with the spots larger and 
yellow-ochre in colour; secondary and median coverts yellow-ochre; 
bastard-wing grey; outer web of first primary brownish-black; remaining 
primaries and secondaries white on the basal half and greyish-brown 
on the terminal with a few curious streaks of brown on either web; 
central tail-feathers barred grey and buff, tipped with grey-green 
edged with a narrow line of buff; remaining tail feathers the same but 
with a broad terminal line of white and each feather deepening in 
colour until the outermost are dark grey, merely stippled with rufous 
at the base; chin, upper throat, sides of head and neck chestnut, 
extending as a collar around the neck except in the centre, where it 
pales first into orange and then into the grey of the neck; a tri- 
angular patch of black on the lower throat, sometimes extending up 
the sides of the neck; breast grey, followed by a black band extend- 
ing up the sides of the shoulders; a broad belt of vinous or pinkish, 
grey follows the black; abdomen, flanks, upper thighs and and vent 
chocolate-brown or blackish, the rusty bases to the feathers some- 
times showing through; lower tail-coverts, lower thighs and feathering 
of tarsus white." 
Adult Female 
"Whole upper plumage pinkish-grey, the head, nape and upper back 
with black streaks, the remainder more rufous and barred; central tail- 
feathers like the back, each succeeding pair darker and with broad 
terminal bars of white; scapulars and inner wing-coverts like the back; 
quills like those of the male but browner and with the tips and edges of 
inner webs of the primaries white; primary coverts grey; secondary coverts 
dark grey, median coverts yellow-ochre on the visible portions, chin, 
throat and sides of head yellowish-grey, the sides of the head, lores 
and ear-coverts finely streaked with black; lower throat with reversed 
half-moonshaped band of black, followed by a pearl-grey band fading 
into pinkish-grey on the breast; remainder of lower parts as in the male. 
-"Golours of soft parts, iris brown, edge of eyelids lemon-colour; 
bill pale to darkish plumbeous, tip blacker, legs and feet grey, 
tinged brown, earthy, or plumbeous, claws darker." 
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