Collocalia linchi Sharpe, Hand-List (1900), 2, 90 (part); Oates
and Reid, Cat. Birds' Eggs (1903), 3, 77 (part).
Salangana linchi McGregor and Worcester, Hand-List (1906), 59.
Collocalia linchi isonota Oberholser,
Proc. Acad. Nat. Sci. Philad. (1906), 58, 208.
Pi-ping-aú, Benguet.
Bongao (Everett); Luzon (Whitehead, McGregor); Mindanao (Koch &
Schadenberg); Mindoro (McGregor, Porter).
Adult.--About the size of and very much like Collocalia marginata
but without white margins to tail-coverts, and with more white on
the abdomen.
Young.--The young bird resembles the adult in plumage but the tarsi
are flesh-color.
Nest.--Composed of moss or lichens and placed on the ground in the
protection of grass or ferns. Two eggs measure 22.3 by 13.9 and 21.5
by 13.9.
Genus CHÆTURA Stephens, 1826.
Size large, length 100 to 200 mm. or even more; shafts of tail-feathers
very stiff and extending a short distance beyond the webs; claws
strong and curved. Birds of this genus are very strong and steady in
flight and usually feed high in the air.
Species.
a1. Much larger; length, over 200 mm.; chin and throat black.
b1. No white spot on side of forehead. ... gigantea (p. 357)
b2. A large white spot on each side of forehead.
c1. Under wing-coverts uniform dark brown. ... celebensis (p. 358)
c2. Under wing-coverts edged with white. ... dubia (p. 359)
a2. Much smaller; length, less than 120 mm.; chin and throat
white. ... picina (p. 359)