Falco cuculoides Temminck, Pl. Col. (1823), 1, pls. 110, 129.
Astur cuculoides Sharpe, Cat. Birds Brit. Mus. (1874), 1, 115,
pl. 4, fig. 2; Hand-List (1899), 1, 250; McGregor, Bull. Philippine
Mus. (1904), 4, 15; McGregor and Worcester, Hand-List (1906), 41.
Cagayancillo (McGregor). China; in winter to the Malay Archipelago.
"Adult.--Above light slaty gray, the margins to the feathers rather
darker, the ear-coverts and sides of neck a little paler than the
upper surface; lores slightly whitish; under surface of body very
pale vinous, somewhat tinged with ashy on sides of breast and throat,
the latter being otherwise whitish; lower flanks, abdomen, under
tail-coverts, and thighs white; the latter indistinctly dusted with
ashy; under wing-coverts and axillars pure white; upper wing-coverts
slaty gray like back; quills blackish, shaded above with slaty gray,
lower surface of primaries black, all the quills white at base of inner
web, more extended on the secondaries, which are ashy gray toward the
tips; tail deep slaty gray, nearly uniform above, grayish ash-color
below, inclining to white near base of feathers and crossed with five
bands of darker brown, the subterminal one broadest. Cere yellow;
bill horn-brown; feet yellow, claws black; iris dark brown. Length,
310; culmen, 18; wing, 203; tail, 127; tarsus, 51." (Sharpe.)
A male specimen from Cagayancillo measures: Length, 300; wing, 190;
tail, 136; culmen from base, 20; tarsus, 40. Iris very dark brown; bill
black, greenish at base; cere orange; feet light orange; nails black.
Genus ACCIPITER Brisson, 1760.
This genus is closely related to Astur but the plumage is always more
or less mottled or barred and the middle toe is relatively longer;
culmen from front margin of cere less than half the middle toe without
claw; notch in upper mandible less pronounced.
Species.
a1. Under parts with wide dark bars, with wide shaft-stripes, or with
large round drop-like spots; tarsus of male, 42; of female, 44.
b1. Fourth primary considerably longer than fifth. ... gularis
(p. 219)
b2. Fourth primary but slightly longer than fifth. ... virgatus
(p. 220)
a2. Under parts nearly uniform dull chestnut, abdomen, flanks, and
thighs narrowly barred with white; tarsus of male, 48; of female,
54. ... manillensis (p. 220)