Hyloterpe fallax McGregor, Bull. Philippine Mus. (1904), 4, 27;
McGregor and Worcester, Hand-List (1906), 93.
Sa-mot ba-sit, Calayan.
Calayan (McGregor).
Adult.--Top of head hair-brown washed with olive-green; remainder of
upper parts, including exposed edges of wing-feathers and rectrices,
dark olive-green; ear-coverts drab; chin and throat white with
distinct dusky shaft-lines, bordered posteriorly by a crescentic,
dusky band of drab, washed posteriorly with olive; breast, abdomen,
and crissum yellow, pale for the greater part, but bright lemon-yellow
on crissum; sides of breast and flanks dusky olive-green; feathers
of thighs gray, tipped with yellow; edge of wing, under wing-coverts,
and axillars white washed with yellow; inner webs of quills edged with
white. Bill black; legs plumbeous; nails flesh-color. Measurements
of male cotype: Length, 152; wing, 83; tail, 64; culmen from base,
17; bill from nostril, 11; tarsus, 21. Female cotype, wing, 79; tail,
67; culmen from base, 17; bill from nostril, 11; tarsus, 21.
Immature.--Sides of face and pectoral band washed with faint reddish
brown; edges of wing-quills reddish brown. Bill dark brown, lower
mandible lighter.