66 
Birds of Celebes: Falconidae. 
black centres passing into light brown at the margins, giving a streaked appearance; 
feathers about eye brownish slaty; the rest much as in the above, but the white 
under surface more abundantly streaked with brown (N. Celebes — Faber in Ley d 
Mus. Nr. 45, 35). 
Another specimen, a little older, lias the thighs, belly, axillaries and under 
tail-coverts well barred with brown; under wing-coverts with sagittate spots of brown 
showing a tendency to form into bars; breast huffy white, streaked with sepia-brown 
(Minahassa, V. Musschenbr. in Leyd. Mus.). 
The specimen in the Leyden Museum figured hy Schlegel (a I) is not quite 
adult, though more advanced than the immature bird described by Grurney (6)\ 
under wing-coverts white, touched up with a few small streaks of dark sepia or little 
bars of faint brownish or rufous; the bars — especially the white ones — on belly. 
flanks and under tail- coverts nuicb broader than in adult 
Leyd. Mus.). 
'Q, Bone, Bosenb. in 
Measurements. 
Wing 
Tail 
Tarsus 
Mid. toe 
with claw 
Culmen 
from cere 
a. (3920) ad. S. Celebes (Bibbe & Kiilin) . . . 
370 
270 
48 


b. (5756) ad. Manado, N. Cel 
370 
250 
46 
— 
22 
c. (C 14500) ad. Peling Id. V — VHI. 95 (Nat. Coll.) 
370 
245 
50 
70 
25 
d. (Sarasin Coll) Q ad. Kema, N. Cel. 5. X. 93 
375 
260 
— 
— 
25 
e. (14011) juv. N. Celebes . 
350 
247 
50 

— 
Distribution. Celebes, Peling. — Bone in Gorontalo (v. Bosenberg a 2), IVLnahassa (Meyer 
i, 4, Guillem a rd 10] etc.), S. Peninsula, Maros (Ribbe & Kllhn); Peling Id. 
(Nat. Coll.). 
This rare Honey-buzzard was known until recently only from the northern 
Peninsula of Celebes, but, as is shown above, there is one in the Dresden 
Museum from South Celebes and one from Peling Island. There is a fine 
series of eleven in the Leyden Museum. 
The similarity of the adult plumage of this Honey-buzzard to that of the 
adult Celebesian Hawk-eagle, Spizaetus lanceolatus, was noticed by Schlegel 
when figuring’ the species ( a I), and has since been commented upon by other 
writers. The resemblance in coloration may, indeed, be spoken of as perfect 
(see our plate), as remarkable as that of X.enopirostris polleni and Tylas edwardsi 
in Madagascar, where the plumage of one bird is, as Prof. Newton says, 
counterfeited in the other, “feather for feather” (Diet. B. p. 574). Gurney, 
who knew more about birds of prey than anybody, termed the case of the 
Celebesian Pernis and Spizaetus as extraordinary. The young in first plumage 
of the Honey-buzzard, now described and figured for the first time, is entirely 
different in coloration from its parents, but just like the Hawk-eagle at the 
same age! Mr. Wallace has cited a corresponding case seen in two American 
Hawks, a Sparrow-hawk and an insect-eating Harpagus (Contrib. Nat. Select. 107; 
and Newton, Diet. B. 574) — young like young, and adult like adult. On 
an earlier page of this book (p. 26), we have drawn attention to another case 
of exactly the same nature — that of the Hawks Spilospizias trinotatus and 
