Æthopyga boltoni Mearns, Proc. Biol. Soc. Wash. (1905), 18,
4; McGregor and Worcester, Hand-List (1906), 98; Grant, Ibis
(1906), 472.
Kah-poi-yah-poi-yuh, or kah-pue-yoo-ahn, Bagobo of Mount Apo.
Mindanao (Mearns, Goodfellow).
"Adult male.--Entire head and neck all round, except middle of chin and
throat, slate-gray, faintly washed with french-green, the feathers of
the forehead narrowly edged with metallic french-green; upper back
gray, strongly washed with oil-green; lower back olive-green; rump
citron-yellow; wings brownish black with wing-coverts and outer webs
of secondaries olive-green; under wing-coverts and edges of inner
webs of primaries and secondaries white; tail with longest feather
12 mm. longer than the next, 25 mm. longer than the outer rectrix;
middle pair of tail-feathers entirely metallic french-green, the
remaining rectrices being green-black, broadly tipped with gray on
the outer and white on the inner webs; under parts with a median
stripe of citron-yellow extending from bill to chest, broadening
posteriorly and minutely mixed with orpiment-orange at upper margin of
chest; flanks, abdomen, and under tail-coverts yellow; chest orange;
pectoral tufts chinese-orange. Iris red; bill black faintly tipped
with horn-color; feet and claws black, except the under side of toes
which are yellowish. Length, 130; alar expanse, 180; wing, 57; tail,
55; culmen (chord), 21; tarsus, 18; middle toe with claw, 14.
"Adult female.--Head, neck all round, and chest slate-gray; upper
parts, including upper wing-coverts and exposed outer webs of
wing-quills, olive-yellow; tail similar to that of male, but shorter
and duller, with feathers rounded at tip; under parts, including under
tail-coverts, yellow, whitish on middle of abdomen. Size considerably
smaller than male. Culmen, 18; wing, 48.
"Young male in first plumage.--Head, sides of throat, and upper
parts smoke-gray, washed on lower back, rump, and upper tail-coverts
with green; upper wing-coverts and exposed portion of outer webs of
quills olive-green; under parts, including stripe on middle of chin
and throat, smoke-gray washed with greenish yellow; lining of wings
white; tail-feathers pointed, similar to the adult but shorter and
duller. Iris brown; bill black, orange at base, yellow and orange
inside; metatarsus black; toes orange, dusky above. Older males soon
grow to resemble adults, the orange first showing in the middle of
the breast, the flanks and belly becoming yellow at the same time,
the pectoral tufts and richest coloring probably not appearing before
the second year." (Mearns.)