.1 gm., June 30, 1962, MCT 2570; [Female]
ovary small, September 8, 1962, MCT 2887. 5.5 mi. SW Tenom: [Female],
December 20, 1962, MCT 3485.

This swiftlet was seen every day while we were at the Cocoa
Research Station and was common also in the mountains around Tenom,
where it flew in and out of the fog over our camp.

_=Collocalia esculenta=_ ssp.: White-bellied Swiftlet.--_Specimens_, 7:
Cocoa Research Station: [Male], 5.5 gm., July 4, 1962, MCT 2591; [Male],
6.2 gm., July 5, 1962, MCT 2594; [Male], 6.2 gm., July 1, 1962, MCT
2574; [Female], 6.0 gm., July 4, 1962, MCT 2589; [Female], 5.7 gm., July
4, 1962, MCT 2590. 12 mi. N Kalabakan: [Male] testis 4 x 2 mm., November
10, 1962, MCT 3236; [Male], November 10, 1962, MCT 3237.

This was the most abundant of all the swifts at the Cocoa Research
Station and in the Kalabakan area and was seen also at Semporna on
August 16, 1962, in a small coral cave near the District Officer's
house. This cave was 10 feet high at most, but averaged five to six
feet. It harbored about 1,000 birds, most of them nesting back in
the dimly lit zone but one small group of 50 nested in the entrance
in bright light. The adults were still feeding young, although the
latter could fly strongly.

_=Chaetura leucopygialis=_ (Blyth): White-rumped Spine-tailed
Swift.--_Specimens_, 12: Cocoa Research Station: [Female] well-developed
brood patch, June 28, 1962, MCT 2565; [Female], 12.9 gm., June 30, 1962,
MCT 2567; [Female], June 30, 1962, heavy molt on body, head, wing, tail,
MCT 2568; [Female], 14.5 gm., June 30, 1962, MCT 2569; [Female], 13.0
gm., June 30, 1962, MCT 2571; [Female], 13.0 gm., July 1, 1962, MCT
2572; [Male] testis 4 x 2 mm., 12.3 gm., July 1, 1962, MCT 2575; [Male]
testis 2 x 1 mm., 14.9 gm., July 2, 1962, MCT 2576; [Female], 15.4 gm.,
July 5, 1962, MCT 2595; [Male] testis 2 x 1 mm., 15.4 gm., wing molt,
July 5, 1962, MCT 2596; [Male] testis 2 x 1 mm., 11.9 gm., July 6, 1962,
MCT 2598; [Female], 13.0 gm., July 6, 1962, MCT 2599.

This species was common around the Cocoa Research Station but was
not seen elsewhere. There is some variation in color within the
populations.

_=Hemiprocne comata comata=_ (Temminck): White-whiskered Tree
Swift.--_Specimens_, 3: Cocoa Research Station: [Male] testis 2 x 1 mm.,
17.0 gm., July 28, 1962, MCT 2675; sex?, young in juvenal plumage, MCT
2812; [Male], April 28, 1963, ADG 76.