- Hirundo pacifica Latham, Index Orn. Suppl. (1801), 58.
- Micropus pacificus Hartert, Cat. Birds Brit. Mus. (1892), 16, 448.
- Cypselus pacificus Sharpe, Hand-List (1900), 2, 96; McGregor, Phil. Jour. Sci. (1907), 2, sec. A, 339 and 346, pls. 4 & 5, fig. 1; Oates and Reid, Cat. Birds’ Eggs (1903), 3, 81.
Batan (McGregor, Mearns); Camiguin N. (McGregor). Eastern Siberia, China, Japan, Formosa, Burmese provinces, Assam, Manipur; in winter to Australia.
Adult.—General color blackish brown; a broad rump-band white, its feathers with brown shafts; upper parts with a slight oil-green gloss; loral feathers white with black tips; chin and throat white with narrow dusky shaft-lines; sides of head and neck light dingy brown; under parts and under wing-coverts brown, each feather with a wide white fringe and a deep brown subterminal band; under tail-coverts narrowly fringed with white. Iris brown; bill and nails black; feet blackish brown. Length, 184 to 190. A male measures: Wing, 182; tail, 77; depth of fork, 29; bill from frontal feathers, 7. A female measures: Wing, 178; tail, 77; depth of fork, 29; bill from frontal feathers, 8.
This handsome swift was observed in large numbers on Batan Island and all of our specimens were killed within the town of Santo Domingo de Basco. Near the summit of Mount Araya (1,160 meters) numbers of these birds were seen in their graceful and powerful flight.
326. MICROPUS SUBFURCATUS (Blyth).
LESSER WHITE-RUMPED SWIFT.
- Cypselus subfurcatus Blyth, Jour. As. Soc. Beng. (1849), 18, 807; Blanford, Fauna Brit. Ind. Bds. (1895), 3, 169; Sharpe, Hand-List (1900), 2, 96; Oates and Reid, Cat. Birds’ Eggs (1903), 3, 82; McGregor, Phil. Jour. Sci. (1907), 2, sec. A, 346, pls. 4 & 5, fig. 2.
- Micropus subfurcatus Hartert, Cat. Birds Brit. Mus. (1892), 16, 456.
Camiguin N. (McGregor). Northeastern Bengal, Indo-Chinese provinces, southern China, Malay Peninsula, Sumatra, Java, Borneo.
Adult.—Very similar to Cypselus pacificus but much smaller; under parts darker, more blackish brown and the feathers without white fringes.
“Bill black; iris dark brown; legs and feet varying from deep purplish black to flesh-color. Length, about 146; tail, 51; wing, 140; tarsus, 10; outer rectrices, 7, longer than middle pair.” (Blanford.)