A Manual of Philippine Birds

by Richard C. McGregor

Genera.

• a¹. Tail nearly square or slightly forked; or, if decidedly graduated, the wing over 350 mm.
  • b¹. Bill without a distinct tooth on its cutting edge; first primary much shorter than second or third.
    • c¹. Feathers of lores and circumocular region not scale-like; loral bristles present.
      • d¹. Tail not forked.
      • d². Tail slightly forked, middle feathers about 10 mm. shorter than outermost; unfeathered portion of tarsus covered with small round scales. Elanus (p. [234])
    • c². Feathers of lores and large circumocular area short and scale-like; no hairs about the bill; tarsus covered with long feathers for more than half its length, unfeathered portion with small hexagonal scales on all sides. Pernis (p. [235])
  • b². Bill with one or two well-developed teeth on its cutting edge; first primary nearly as long as second and usually longer than third.
    • c¹. Head crested; tarsus feathered for half its length. Baza (p. [236])
    • c². Head not crested; tarsus feathered at base only and covered with hexagonal scales.
      • d¹. No tubercle in nostril; length less than 200 mm. Microhierax (p. [238])
      • d². A tubercle in center of nostril; length more than 250 mm. Falco (p. [239])
• a². Tail distinctly graduated; bill shorter; feet smaller and weaker; middle toe without claw two-thirds to three-fourths of tarsus; wing less than 250 mm. Cerchneis (p. [243])

Genus LOPHOTRIORCHIS Sharpe, 1874.

Cutting edge of bill sinuate; a narrow occipital crest about 60 mm. long; wing moderate in length; first primary very short; third and fourth subequal; inner web of first four quills abruptly and deeply cut; legs closely feathered to base of toes which are covered with small hexagonal scales; claws strong and curved.

182. LOPHOTRIORCHIS KIENERI (Geoffroy St. Hilaire).

RUFOUS-BELLIED HAWK.

• Astur kienerii Geoffroy St. Hilaire, Mag. de Zool. (1835), cl. 2, pl. 35.
• Lophotriorchis kieneri Sharpe, Cat. Birds Brit. Mus. (1874), 1, 255; Hand-List (1899), 1, 262; Grant, Ibis (1895), 438; McGregor and Worcester, Hand-List (1906), 42.

Luzon (Heriot, Whitehead); Marinduque (Steere Exp.); Mindanao (Steere Exp., Celestino); Panay (Steere Exp.); Sibuyan (McGregor); Tablas (Celestino). Malay and Indian Peninsulas, Lesser Sunda and Indo-Malayan Islands, Indo-Chinese provinces, Ceylon, Celebes.

“Adult.—Above black, with an occipital crest 60 mm. in length; ear-coverts somewhat mixed with whitish; cheeks, throat, and breast pure white, with a few narrow black shaft-lines on the side of the latter; rest of under surface, including under wing- and tail-coverts, tawny rufous, streaked with black shaft-stripes, rather broader on the flanks, where they are more merged; wings black, some of the feathers externally brownish, the inner lining of quills whitish ashy, with a few blackish bars on the inner web of the primaries, the secondaries narrowly tipped with white; tail black, very slightly tipped with whity brown, and with indications of brown cross-bands under certain lights, the lower surface of the tail ashy white, with a subterminal brown bar. Cere yellow; bill leaden blue; feet yellow, claws black; iris brown. Length, 533; culmen, 38; wing, 358; tail, 211; tarsus, 74.” (Sharpe.)