Birds of Celebes: Falconidae. 
49 
are content for the most jjart to pass the cold season there, without going further 
south. 
The next species, Butastiir liventer — distinguishable by its rufous hazel tail 
and yellow hill • — ■ is perhaps also migratory, but this species has only been 
found in South Celebes. It is not known from China and the Philippines; its 
northermost known quarters are Pegu, where it breeds, and hence its wandering 
probably takes place by way of Malacca and the chain of islands from Sumatra 
eastwards, so reaching South Celebes before any other part of the island. So, 
also, Polioaetus humilis, likewise a Burmese and Indian species not known in 
China or the Philippines, has only been obtained in South Celebes (in two 
examples) and at Peling Island. See also Lanius tigriniis and lucionensis. 
18. BUTASTUR LIVENTER (T emm.). 
Rufous-tailed Buzzard-eagle. 
a. Falco liventer (I) Temm., PI. Col. 1S27, Rr. 438. 
_ b. Buteo liventer Guv.; (1) Schl., Mas. P.-B. Buteones 1862, 21; (II) id., Valkvogels 1866, 
33, 69, pi. 21, f. 1; (3) id.. Rev. Acc. 1873, 111. 
c. Buteo pallidus Less., Tr. d’Orn. 1831, 82. 
d. Astur liventer Gray, List. Acc. B. M. 1844, 34. 
e. Poliornis liventer Kaup; (1) Walden, Tr. Z. S. 1872, Vni, 37; (2) Hume, Str. P. 
1873, I, 318; (3) Salvad., Oat. Ucc. Borneo 1874, 9; (4) Hume, Str. P. 1875, 
HI, 31; (5) Meyer, Ibis 1879, 56. 
f. Circaetus liventer [G. Muller) (1) Kaup, Isis 1847, 267. 
Butastur liventer (1) Sharpe, Cat. B. 1874, I, 296; (2) Hume & Davison, Str. P. 1878, 
VI, 21, (3) Oates, ib. 1882, X, 180; (4) id., B. Brit. Burmah 1883, II, 196; 
Gurney, Diurn. B. of Prey 1881, 73; (5) W. Bias., Ztschr. ges. Orn. 1885, 207, 
208, 233; (G) Everett, J. Straits Br. R. A. S. 1889, 183; (7) Oates, Hume’s 
Nests c% Eggs 1890, III, 161; (8) Hartert, Kat. Vog. Prankf. M. 1891, 176; 
(9) Vorderman, N. T. Ned. Ind. 1892, LI, 375; (10) Biittik, Zool. Ergebn. Webers 
Reisc Ost-Ind. 1893, HI, 271; (11) Blank, Paun. Br. Ind. B. HI 1895, 364; 
(12) M. & Wg., Abb. Mus. Dresden 1896, Nr. 1, p. 7; (13) Hartert, Nov. Zool. 
1896, 162. 
“Buetje”, Tjamba, S. Celebes (Platen 5). 
For further references see Sharpe 7; Salvador! e 3\ Oates 4. 
Figures and descriptions. Temminck a 1; Scblegel i //; Kaup/i; Sharpe i; Hume e 4; 
Oates 3,4, 7; W. Bias. 5; Vorderman 5; Blanford 11. 
Adult. Above greyish brown, more nifous brown on upper tail-coverts and scapulars; shaft- 
streaks dark; primary coverts and remiges hazel-rufous, the inner webs of the 
latter crossed with about six narrow dark bars, the outer webs for the terminal half 
ashy broum; tail hazel-rufous crossed with from two to seven naiTOW bars — the 
basal ones being sometimes absent; throat whitish; under surface drab-brown bko 
the face, hut mottled on the abdomen with broken cross-bars of wliite; thighs, under 
tail-coverts and under side of wing white, the dark bars of the quills being rather 
faint. 
“L’is light yellow; eyelids, cere, feet and Itill yellow, tip of latter black” (§, 
S. Celebes: Platon — Nr. 6738 and others). 
Meyer & Wiglesworth, Birds of Celebes (Oct. 9tl‘, 1S97). 7 
