Species of Thailand
Thai: นกอินทรีดำ, nok in-sree dam
Binomial name: Ictinaetus malaiensis, Coenraad Jacob Temminck, 1822
The black eagle (Ictinaetus malaiensis) is a bird of prey. Like all eagles, it is in the family Accipitridae, and is the only member of the genus Ictinaetus. They soar over forests in the hilly regions of tropical Asia and hunt mammals and birds, particularly at their nests. They are easily identified by their widely splayed and long primary "fingers", the characteristic silhouette, slow flight and yellow ceres and legs that contrast with their dark feathers.
The black eagle breeds in tropical Asia. Race perniger (Hodgson, 1836) is found in the Himalayan foothills west through Nepal into northeastern Murree in the forests of the Eastern and Western Ghats in peninsular India and Sri Lanka. The species also extends into the Aravalli range of northwestern India. The nominate race malaiensis (Temminck, 1822) is found in Burma, southern China (Yunnan, Fujian) and Taiwan, into the Malay Peninsula. They are generally residents and no migrations have been observed.
In a study in southern India, it was found to favour forests with good forest cover and was absent from areas where the cover was less than 50%.
The black eagle is a large raptor at about 70–80 cm in length and 164–178 cm in wingspan, with a weight of between 1000 and 1600 grams. Adults have all-black plumage, with a yellow bill base (cere) and feet. The wings are long and pinched in at the innermost primaries giving a distinctive shape. The tail shows faint barring and upper tail covers paler. When perched the wing tips reach till or exceed the tail tip. The wings are held in a shallow V (wings just above the horizontal plane) in flight. Seen on hot afternoons, scouring the treetops for a nest to maraud, this bird is easily spotted by its jet black colour, large size, and a 'characteristic' slow flight, sometimes just above the canopy.
Sexes are similar, but young birds have a buff head, underparts and underwing coverts.
The wing shape helps to distinguish this species from the dark form of crested hawk-eagle, (Spizaetus cirrhatus). The tarsi are fully feathered and the toes are relatively stout and short with long claws (particularly on the inner toe) that are less strongly curved than in other birds of prey.
The species name is spelt malayensis in most publications but the original spelling used by Temminck in his description uses the spelling malaiensis according to a 2011 finding of some of the original covers of the part publications leading to taxonomists applying the principle of priority and rejecting any later spelling emendations.
The black eagle eats mammals, birds and eggs. It is a prolific nest-predator and is known for its slow flight just over the canopy. Due to this eagle's ability to remain aloft for long periods with minimal effort, the Lepcha people of India's Darjeeling district described it as a bird that never sat down. The curved claws and wide gape allow it to pick up eggs of birds from nests. Along with swallow-tailed kites they share the unique habit of carrying away an entire nest with nestlings to a feeding perch. Squirrels, macaques and many species of birds emit alarm calls when these birds are spotted soaring over the forest. The Indian giant squirrel has been noted as a prey of this species and young bonnet macaques may also fall prey to them.
The courtship display involves steep dives with folded wings with swoops up in a U shape into a vertical stall. They build a platform nest, 3 to 4 feet wide, on a tall tree overlooking a steep valley. One or two white eggs which are blotched in brown and mauve may be laid during the nesting season between January and April. The nest site may be reused year after year.
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- Ictinaetus malaiensis
- Thai: นกอินทรีดำ, nok in-sree dam
- Neopus malayensis
Least Concern (IUCN3.1)
- Chiang Dao Wildlife Sanctuary
- Doi Inthanon National Park
- Doi Pha Hom Pok National Park
- Doi Phu Kha National Park
- Doi Suthep-Pui National Park
- Kaeng Krachan National Park
- Khao Luang National Park
- Khao Nam Khang National Park
- Khao Soi Dao Wildlife Sanctuary
- Khao Sok National Park
- Khao Yai National Park
- Khao Yoi District, Phetchaburi
- Khun Chae National Park
- Kui Buri National Park
- Mae Ai District, Chiang Mai
- Mae Moei National Park
- Mae Wong National Park
- Mueang Chiang Mai District, Chiang Mai
- Nong Bong Khai Non-hunting Area
- Phu Hin Rong Kla National Park
- Phu Ruea National Park
- Phu Suan Sai National Park
- Sirinat National Park
- Takua Pa District, Phang Nga
- Thong Pha Phum National Park
Range map of Ictinaetus malaiensis in Thailand
Important note; our range maps are based on limited data we have collected. The data is not necessarily accurate or complete.
Special thanks to Ton Smits, Parinya Pawangkhanant, Ian Dugdale and many others for their contribution for range data.
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