Sunda Blue Flycatcher (Cyornis caerulatus) [XC19074]
by given in the field guide Birds of Borneo (Myers, 2016).\r\n\r\nThe bird was seen in the lower storey of the forest. from Danum Valley, Sabah, Borneo, Malaysia (song)
Sunda Blue Flycatcher (Cyornis caerulatus) [XC269851]
by Jani Sleutel from near Borneo Rainforest Lodge, Danum Valley, Sabah, Malaysia (call, song)
Subspecies
The following 3 subspecies are recognised:
albiventer Junge, 1933 - Sumatra.
rufifrons Wallace, 1865 - Western Borneo.
caerulatus (Bonaparte, 1857) - Northern, eastern and southern Borneo.
Similar Species
Male Mangrove Blue-Flycatcher (Cyornis rufigastra) is similar, but lacks the contrasting pale forehead and supercilium and is duller on the lower back and rump. Female is blue above with whitish loral spot.
References
See References.