Spilornis panayensis Steere, List Birds & Mams. Steere
Exped. (1890), 7; Grant, Ibis (1896), 527; Whitehead, Ibis (1899),
93; Sharpe, Hand-List (1899), 1, 266; McGregor and Worcester,
Hand-List (1906), 42.
Spilornis holospilus Bourns and Worcester, Minnesota
Acad. Nat. Sci. Occ. Papers (1894), 1, 44 (part).
Si-cub', Bohol.
Bohol (McGregor); Guimaras (Steere Exp.); Masbate (Bourns &
Worcester, McGregor); Negros (Steere Exp., Bourns & Worcester,
Keay); Panay (Steere Exp.); Romblon (Bourns & Worcester, McGregor);
Sibuyan (Bourns & Worcester, McGregor); Tablas (Bourns & Worcester,
Celestino).
"Adult male.--Head black, feathers of crest sulphur-white at base,
then black, narrowly edged with whitish; rest of upper surface with
wings light ashy brown, all the feathers edged with whitish. Tail
broadly tipped with white and with two broad whitish bars and part
of a third basal one; throat bluish ash, unmarked; rest of under
surface pale cinnamon, shaded with ash and spotted and banded
as in S. holospilus. Length, 502; wing, 317; tail, 229; tarsus,
71. Distinguished from S. holospilus by its small size and pale
coloring." (Steere.)
The validity of this species is somewhat doubtful. Bourns and Worcester
consider that it "was founded on differences due to change of season
and to individual variation." Grant thinks "that S. panayensis may
fairly be recognized as a distinct form."
Genus BUTASTUR Hodgson, 1843.
Bill small, its edge slightly sinuate; wings moderate, primaries
cut on inner web; first primary short; secondaries much shorter
than primaries; tarsus feathered in front for a short distance,
a row of large hexagonal scales in front, rest of tarsus with small
hexagonal scales.