
Photo: Afsar Nayakkan · CC BY 4.0 (May be cropped or resized)
Ceyx erithaca
Habitat
Lowlands, typically not above 1,000–1,300m; keeps within 1–2m of the forest floor
Size
12.5–14cm including bill and tail
Weight
Females 14–16g; males 14–21.5g
The black-backed dwarf kingfisher is only slightly larger than a medium-sized hummingbird, 12.5 to 14cm long including bill and tail. Females typically weigh 14 to 16g and males 14 to 21.5g. It keeps low to the ground and is known to perch and fly within 1 to 2m of the forest floor (Wikipedia, general species account).
The lowlands it occupies typically do not exceed 1,000 to 1,300m in elevation. The sources read for the Bhutan guide give these details only. No plumage, range, diet or breeding information was found, so none is stated, and its occurrence in Bhutan is flagged for checking.