_=Ninox scutulata borneensis=_ (Bonaparte): Hawk-owl.--_Specimen_, 1: Tenom: [Female] largest ovum 2 mm., oviduct evident, January 6, 1963, MCT 3583. This female, taken in a bird net in a grass-scrubland association, was coming into breeding condition. _=Strix leptogrammica=_ Temminck: Malaysian Wood Owl.--_Specimens_, 2: Cocoa Research Station: sex?, July 9, 1963, ADG 182; [Male], May 25, 1963, ADG 111. On September 7, 1962, I flushed two of these owls from a tree beside the Apas River in primary forest. One was subsequently shot but lost. Garcia's two specimens were not identified to subspecies. _=Caprimulgus macrurus salvadori=_ Sharpe: Long-tailed Nightjar.--_Specimens_, 3: Tuaran: [Female], January 12, 1963, MCT 3592; [Female], March 2, 1963, ADG 6. Mt. Rumas: [Male], March 6, 1963, ADG 13. This was an abundant bird on the Jesselton-Tuaran road but was not seen at any of the other collecting stations in North Borneo. _=Collocalia fuciphaga natunae=_ Stresemann: Thunberg Swiftlet.--_Specimens_, 3: Cocoa Research Station: [Female] largest ovum 7 mm., oviduct enlarged, 13.1 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.