Collocalia whiteheadi Grant, Ibis (1895), 459; Sharpe, Hand-List
(1900), 2, 89; Oberholser, Proc. Acad. Nat. Sci. Philad. (1906),
58, 192.
Salangana whiteheadi McGregor and Worcester, Hand-List (1906), 58.
Collocalia unicolor amelis Oberholser,
Proc. Acad. Nat. Sci. Philad. (1906), 58, 193.
Bantayan (McGregor); Batan (McGregor); Bohol (McGregor);
Cagayancillo (McGregor); Cebu (McGregor); Luzon (Whitehead,
McGregor); Mindoro (McGregor, Porter); Sibuyan (McGregor); Palawan
(Whitehead, White); Verde (McGregor).
Adult.--Similar to Collocalia lowi in coloration but slightly larger
with the tail distinctly forked and the tarsi entirely devoid
of plumes. Iris brown; bill and nails black; legs dark reddish
brown. Measurements from ten skins of each sex from Irisan, Benguet
Province, are: Males, wing, pressed flat against the rule, 119 to 125;
tail, 46 to 51; depth of fork, 5 to 8. Females, wing, 118 to 125;
tail, 48 to 56; depth of fork, 6 to 9.
Young.--Nestling; similar to the adult but more sooty above and
lacking the green gloss; lower parts grayer. Iris dark brown; bill
and nails black; legs pale flesh.
Nest.--In Benguet Province, Luzon, eggs and nestlings were found in
June. The nests were made of green moss and placed in a water-worn
cave. The eggs are pure white. Two specimens measure, respectively,
22.3 by 13.9 and 23.6 by 14.2.