
Photo: (c) Rejoice Gassah, some rights reserved (CC BY) · CC-BY (May be cropped or resized)
Ficedula tricolor
Habitat
Subtropical or tropical moist montane forests
Range
The Himalayas, central China, Yunnan and northern Indochina
The slaty-blue flycatcher is a member of the Old World flycatcher family native to the Himalayas, central China, Yunnan and northern Indochina. Its natural habitat is subtropical or tropical moist montane forest, and a single sighting was recorded from Sigiriya, Sri Lanka, in February 1993 (Wikipedia, general species account).
That short account is the only source read for the Bhutan guide. It does not name Bhutan specifically, and gives no plumage, size, diet or breeding information, so none is stated.