Muscicapa venusta Deignan: Bornean Blue Flycatcher.—Specimens, 6: Cocoa Research Station: ♂, September 24, 1962, MCT 2939; ♂, June 12, 1963, ADG 128. 12 mi. N Kalabakan: ♂, October 12, 1962, MCT 3014; ♂, October 19, 1962, MCT 3089. Oil Palm Research Station: ♀, August 10, 1963, ADG 218. Kinabatangan: sex?, October 15, 1963, ADG 309.
The "blue" flycatcher of the Quoin Hill area was observed several times in the primary forest and primary forest edge. On July 14, 1962, I saw a male and a female of M. venusta bathing in a shallow stream in the deep forest. They fluttered their wings in the water and then flew to a nearby fallen log and preened for several minutes.
Muscicapa rufigastra rufigastra Raffles: Mangrove Blue Flycatcher.—Specimen, 1: Tuaran: ♂, December 14, 1963, SCFC 33.
Muscicapa dumetoria mulleri Blyth: Orange-breasted Flycatcher.—Specimens, 5: Cocoa Research Station: ♂, 11.8 gm., July 25, 1962, MCT 2661; ♀, November 1, 1962, MCT 3198; ♂ testis 3 × 2 mm., November 11, 1962, MCT 3246; ♂ testis 5 × 4 mm., November 28, 1962, MCT 3384. 5.5 mi. SW Tenom: ♂, December 25, 1962, MCT 3531.
This species was seen only in the understory of primary forest. On November 10, I watched a male and female feeding about three feet above the ground in the undergrowth. They sat on small vines and plants and darted out after insects. I never observed this species more than 20 feet above the ground.
Muscicapa narcissina Temminck: Black and Yellow Flycatcher.—Specimens, 2: Cocoa Research Station: ♀, November 27, 1962, MCT 3331. 5.5 mi. SW Tenom: ♂, December 20, 1962, MCT 3484.
The two specimens were taken in nets in the primary forest. They cannot presently be assigned with certainty to subspecies.
Rhinomyias umbratilis (Strickland): White-throated Jungle Flycatcher.—Specimens, 19: Cocoa Research Station: ♀, 16.7 gm., July 25, 1962, MCT 2662; ♂ testis 6 × 5 mm., 20.7 gm., July 25, 1962, MCT 2663; ♀, 17.9 gm., July 31, 1962, MCT 2686; ♀, September 29, 1962, MCT 2974; ♂, July 8, 1963, ADG 175. 12 mi. N Kalabakan: ♂, October 10, 1962, MCT 2993; ♀, October 13, 1962, MCT 3027; ♂, October 13, 1962, MCT 3031; ♂, October 14, 1962, MCT 3036; ♂, October 16, 1962, MCT 3053; ♂, October 16, 1962, MCT 3058; ♂, October 18, 1962, MCT 3074; ♀, October 20, 1962, MCT 3107; ♂, October 23, 1962, MCT 3132; ♂, October 25, 1962, MCT 3149; ♀, October 28, 1962, MCT 3174. Ulu Balung Cocoa Estate: ♀, July 11, 1963, ADG 195; ♀, July 12, 1963, ADG 196; ♀, July 19, 1963, ADG 212.
This abundant species at Quoin Hill and Kalabakan was chiefly an inhabitant of primary forest.
On July 31, I observed this species singing at Quoin Hill. One sang with its mouth closed and sounded much farther away than it actually was. The song has seven notes on a descending scale. Birds observed on September 27 were in heavy molt and one specimen lacked tail feathers.
Philentoma pyrrhoptera pyrrhoptera (Temminck): Chestnut-winged Monarch Flycatcher.—Specimens, 10: 12 mi. N Kalabakan: ♂, October 10, 1962, MCT 2992; ♀, October 15, 1962, MCT 3048; ♂, October 20, 1962, MCT 3100; ♂, October 20, 1962, MCT 3105; ♀, November 11, 1962, MCT 3244; ♀, November 16, 1962, MCT 3291. Ulu Balung Cocoa Estate: ♂, July 9, 1963, ADG 180; ♂, July 9, 1963, ADG 181; ♂, July 24, 1963, ADG 215; ♀, July 11, 1963, ADG 192.