The Mountain Kingfisher is a large kingfisher of New Guinea's mountain forests. It has a longer bill than its close relative, although the black marking on the upper bill is absent in the Huon Peninsula subspecies.
Compared with the Yellow-billed Kingfisher, it is larger and has a proportionally longer bill. The black mark on the upper bill is absent in the Huon Peninsula subspecies.
It is active by day and feeds mainly on invertebrates. Records place it in forest in mountainous terrain, mostly at 1,200–2,200 m.
An extinction-risk assessment has not been added yet.