Oriolus isabellæ Grant, Bull. Brit. Orn. Club (1894), 4, 2; Ibis
(1895), 108; (1899), 101; Whitehead, Ibis (1899), 101 (habits);
McGregor, Bull. Philippine Mus. (1903), 1, 7 (description of male);
McGregor and Worcester, Hand-List (1906), 106.
Luzon (Whitehead, McGregor, Celestino).
Adult (sexes alike).--Upper parts, lores, face, ear-coverts, and sides
of neck dark, rich olive-yellow, slightly more olive on crown and
exposed edge of wing-feathers; a circle of light yellow around eye;
entire under parts, wing-lining, and axillars rich lemon-yellow,
slightly darker on chest; thighs slightly olive; wing-quills,
primary-coverts, and greater secondary-coverts narrowly edged with
lemon-yellow; inner webs of quills dusky brown, broadly edged with
lemon-yellow; rectrices edged with lemon-yellow on the tips and inner
webs; shafts brown above, lemon-yellow below. A male from Bataan
Province, Luzon, measures: Length, 215; wing, 114; tail, 82; culmen
from base, 25; bill from nostril, 18; tarsus, 22.5. In a female the
iris was brown with an inner darker and outer lighter ring; bill,
legs, and nails bluish horn-color. Length, 215; wing, 107; tail, 79;
culmen from base, 26; bill from nostril, 19; tarsus, 22.