(19) DUCULA INSIGNIS GRISEICAPILLA (Blyth). 
THE GREY-HEADED IMPERIAL PIGEON. 
(PLATE 8.) 
Carpophaga insignis (part) Blyth, Cat. B.M.A.S.B., p. 232 (1849) ; id., J.A.S.B., 
XXVIII p. 416; Blyth and Wald., B. Burma, p. 144. 
Ducula griseicapilla Wald., Ann. Mag. N.H., XVI p. 228; Hume, Str. Feath., 
IIT p. 402; Blanf., Avi. Brit. I., IV p. 22; Sharpe, Hand-List, I p. 66; 
Oates, Cat. Eggs B.M., I p. 86; Stuart Baker, J.B.N.H.S., XVII p. 970; 
Harington, ib., XIX p. 309; Cook, ib., XXI p. 674 ; Harington, B. Burma, 
p. 65. 
Carpophaga griseicapilla Davis, Str. Feath., V p. 460; Hume and Dav. 
ib., VI p. 418; Hume, ib., VIII p. 109; id., Cat. no. 781, bis; Oates, 
B. Burma, IT p. 302; id., Hume’s Nests and Eggs, 2nd ed., II p. 369; 
Hume, Str. Feath.,, XI p. 295; Salvadori, Cat. B.M., XXI p. 217; 
Stuart Baker, J.B.N.H.S., X p. 360. 
Vernacular Names. AHgnet-nga, Burmese; Daohukuruma  gajao, 
Cachari; Inruikuru gaherba, Naga. 
Description.—Adult male. Differs from insignis in having the crown, 
fore-head, and nape grey, in some specimens quite sharply defined from the 
vinous or lilac-grey of the hind-neck; the rump and upper tail-coverts are 
often more brown and less grey than in insignis, but I can trace no constant 
difference in the plumage of the upper-back, scapulars, and wing-coverts. 
Colours of soft parts. “Feet a rich purplish lake red, claws brown, 
paling at base; soles whity brown; corneous tip of bill pale brown, rest 
of bill and gape the same colour as the feet”? (Davison). The irides are 
greyish-white. 
Measurements. The same as in insignis. Davison gives the weight of 
two males as 1 lb. 7 oz., and 1 lb. 4 oz. respectively. The females do not 
differ from the males either in coloration or size, but average about 1 lb. 3 oz. 
as against an average of about 1 lb. 6 oz. in the male. 
Distribution. This bird is found practically throughout Burma, 
north and south, though absent from the dry zone of plains in north-central 
Burma. Harington records it from the Shan States, Hopwood reports it 
from the Chin Hills, and it extends thence north into the Chittagong hill- 
tracts, Hill Tipperah, and Manipur. In Sylhet and Cachar a few birds are 
intermediate between this and typical insignis but the majority are nearer 
that bird. In the hill-ranges of the Assam Valley typical insignis is found 
and not griseicapilla as recorded by Blanford—possibly a slip. 
Nidification. The nest and eggs are exactly like that of Hodgson’s 
Imperial Pigeon. 
