The Bornean Frogmouth is a Borneo endemic usually associated with lower montane and montane forest. Lowland records have also been reported at Kubah National Park; one observed male had yellow eyes and long facial bristles.
A male observed at Kubah had a broad hooked bill, yellow iris, pale browline, and long facial bristles. White spots edged in black marked its throat, chest, and belly.
At a nest in Kubah, an observed male stayed upright and mostly still, snapping at mosquitoes. A pair recorded there in another year also preened and snapped at mosquitoes.
The 4 May 2013 Kubah nest stood on a horizontal branch about 8 m above ground in forest at roughly 250 m elevation. It was beneath a large leaf and looked like a cup of soft white down.
On 12 August 2017 at Kubah, a pair rested side by side on a horizontal branch. When the female swayed like a leaf and moved away, the male approached; both sometimes moved sideways along the branch.
In the pair seen at Kubah in August 2017, the female was more rufous-tawny than the male, with fewer and smaller white spots on the scapulars and underparts and a narrower white nape collar.
An extinction-risk assessment has not been added yet.