Legge Legge () is a surname. Notable people with the surname include: *Alexander Legge (1866–1933), US businessman, president of International Harvester * Anthony Legge (1939–2013), British archaeologist specialized in zooarchaeology * Arthur Kaye Le ...

's hawk-eagle (''Nisaetus kelaarti'') is a

bird of prey Birds of prey or predatory birds, also known as (although not the same as) raptors, are hypercarnivorous bird species that actively predation, hunt and feed on other vertebrates (mainly mammals, reptiles and smaller birds). In addition to speed ...

. Like all

eagle Eagle is the common name for the golden eagle, bald eagle, and other birds of prey in the family of the Accipitridae. Eagles belong to several groups of Genus, genera, some of which are closely related. True eagles comprise the genus ''Aquila ( ...

s, it is in the family

Accipitridae The Accipitridae () is one of the four families within the order Accipitriformes, and is a family of small to large birds of prey with strongly hooked bills and variable morphology based on diet. They feed on a range of prey items from insects ...

. It breeds in the

Indian subcontinent The Indian subcontinent is a physiographic region of Asia below the Himalayas which projects into the Indian Ocean between the Bay of Bengal to the east and the Arabian Sea to the west. It is now divided between Bangladesh, India, and Pakista ...

, from southern

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

Sri Lanka Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka, also known historically as Ceylon, is an island country in South Asia. It lies in the Indian Ocean, southwest of the Bay of Bengal, separated from the Indian subcontinent, ...

. Its

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

''kelaarti'' honors the physician-zoologist E.F. Kelaart. The English common name honours William Vincent Legge, who described the species in 1878. Legge's hawk-eagle is a medium-sized eagle and fairly large-sized raptor. The typical adult has brown upperparts and pale underparts, with barring on the undersides of the flight

feather Feathers are epidermal growths that form a distinctive outer covering, or plumage, on both avian (bird) and some non-avian dinosaurs and other archosaurs. They are the most complex integumentary structures found in vertebrates and an exa ...

s and tail. The breast and belly are heavily streaked. The wings are broad with a curved trailing edge, and are held in a shallow V in flight. Sexes are similar, but young birds are often whiter-headed. Legge's hawk-eagle was formerly considered to be a subspecies of the mountain hawk-eagle, but it is smaller and has unstreaked buff underwing coverts. A 2008 study based on the geographic isolation and differences in call suggested that this be treated as a full species, ''Nisaetus kelaarti''.Gjershaug, J. O.; Diserud, O. H.; Rasmussen, P. C. & Warakagoda, D. (2008)
An overlooked threatened species of eagle: Legge’s Hawk Eagle ''Nisaetus kelaarti'' (Aves: Accipitriformes)
(PDF) ''Zootaxa'' 1792: 54–66 When all standard measurements are considered, Legge's hawk-eagles average about 5-10% smaller than mountain hawk eagles, although Legge's tail length is slightly greater on average. Furthermore, one male from

weighed , slightly less than most male mountain hawk-eagles. In average total length, males Legge's hawk-eagles average about and females average about . It is a bird of mountain woodland that builds a stick nest in a tree and lays usually a single

egg An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell (a zygote) and to incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the ...

in a

clutch A clutch is a mechanical device that allows an output shaft to be disconnected from a rotating input shaft. The clutch's input shaft is typically attached to a motor, while the clutch's output shaft is connected to the mechanism that does th ...

. Legge's hawk-eagles eat small

mammal A mammal () is a vertebrate animal of the Class (biology), class Mammalia (). Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three ...

s, birds and

reptile Reptiles, as commonly defined, are a group of tetrapods with an ectothermic metabolism and Amniotic egg, amniotic development. Living traditional reptiles comprise four Order (biology), orders: Testudines, Crocodilia, Squamata, and Rhynchocepha ...

s. Despite its relatively modest size, Legge's hawk-eagle is a powerful predator with large talons, like many

booted eagles Booted eagles are eagles that have fully feathered tarsi. That is, their legs are covered with feathers down to the feet. Most other accipitrids have bare lower legs, scaled rather than feathered. They may be treated as an informal group, as ...

, and is sometimes known to occasionally pursue prey as heavy or heavier than itself. This may include

Indian peafowl The Indian peafowl (''Pavo cristatus''), also known as the common peafowl, or blue peafowl, is a peafowl species native to the Indian subcontinent. While it originated in the Indian subcontinent, it has since been introduced to many other part ...

, estimated to weigh .Fam, S. D., & Nijman, V. (2011). ''Spizaetus hawk-eagles as predators of arboreal colobines''. Primates, 52(2), 105-110. File:SpizaetusKelaarti.jpg, ''Nisaetus kelaarti''

Notes

References

* {{Taxonbar, from=Q2827839 Legge's hawk-eagle Birds of South India Birds of Sri Lanka Legge's hawk-eagle Eagles Legge's hawk-eagle