The mountain serpent eagle, also known as the Kinabalu serpent eagle, is a bird of prey that is found in northern Borneo. It is found at altitudes of 1,000–4,100 metres (3,300–13,500 ft) in forest, especially where it becomes stunted. Where their range overlaps, the crested serpent eagle generally occurs at lower altitudes. The mountain serpent eagle is darker than the Bornean subspecies of the crested serpent eagle.
Region
Northern Borneo highlands
Typical Environment
Found in the montane forests of northern Borneo, especially around Mount Kinabalu and the Crocker Range in Sabah, with possible occurrences in adjacent highlands. It inhabits primary montane and upper montane (cloud) forest, including stunted ridge-top growth. The species keeps to forest interiors, edges, and clearings near ridgelines. Where ranges overlap, it typically occupies higher elevations than the crested serpent-eagle.
Altitude Range
1000–4100 m
Climate Zone
Highland
Ease of Keeping
Beginner friendly: 1/5
Also called the Kinabalu serpent-eagle, it is restricted to the montane forests of northern Borneo. It favors stunted, mossy forest and ridgelines at high elevations, usually above where crested serpent-eagles occur. Like other serpent-eagles, it specializes in hunting snakes and other reptiles. Its dark plumage and bold white tail band help separate it from similar species.
Temperament
solitary and territorial
Flight Pattern
soaring glider
Social Behavior
Usually encountered singly or in pairs, patrolling ridgelines and forest canopies. Pairs defend territories and are most vocal while soaring. Nesting is presumed similar to congeners, with a stick platform high in a tree and typically a single egg.
Migratory Pattern
Resident
Song Description
Gives clear, whistled notes, often a piercing, repeated, descending call while circling high. Calls carry over valleys and ridges, especially in the morning.
