Collocalia troglodytes Gray, Gen. Birds (1845), 1, 55, pl. 19;
Hartert, Cat. Birds Brit. Mus. (1892), 16, 507; Sharpe, Hand-List
(1900), 2, 90; Oberholser, Proc. Acad. Nat. Sci. Philad. (1906),
58, 202.
Salangana troglodytes McGregor and Worcester, Hand-List (1906), 59.
Bú-ta bú-ta and sai-aó, Bohol, also used for Salvadori's swiftlet.
Banton (Celestino); Bohol (McGregor); Cebu (Bourns & Worcester,
McGregor); Guimaras (Steere Exp., Bourns & Worcester); Leyte
(Whitehead); Luzon (Jagor, Bourns & Worcester); Marinduque (Steere
Exp.); Masbate (Bourns & Worcester); Mindanao (Everett, Celestino);
Mindoro (Bourns & Worcester); Negros (Steere Exp., Bourns &
Worcester); Palawan (Whitehead, Platen, Bourns & Worcester,
White); Panay (Steere, Bourns & Worcester); Romblon (Bourns &
Worcester, McGregor); Samar (Bourns & Worcester); Sibuyan (Bourns
& Worcester, McGregor); Siquijor (Bourns & Worcester, Celestino);
Ticao (McGregor).
Adult.--Above glossy black, bases of feathers smoky brown; across the
rump a white band 5 mm. wide, the shaft of each feather dusky; chin and
sides of face and neck dusky brown; feathers in front of eye white with
dusky tips; feathers of throat, breast, and abdomen with white tips
and dusky bases and shaft-lines, producing a mottled appearance, the
white predominating on the abdomen; under tail-coverts glossy black.
"Very common throughout the Islands. Builds edible nests. Nests always
in caves, and composed chiefly or entirely of secretion from the mouths
of the birds. When the birds are persistently robbed, however, they
seem to become discouraged, and mix in grass, stems of small plants,
moss, etc. Two or three white eggs are deposited. They measure:
15.2 to 17.7 by 10.1 to 10.9. Fourteen males from Siquijor average,
92 in length; wing, 92; tail, 41; culmen, 4; tarsus, 8; middle toe
with claw, 9. Bill, legs, and feet black." (Bourns and Worcester MS.)