The brahminy kite (Haliastur indus), also known as the red-backed sea-eagle in India, is a medium-sized bird of prey in the family Accipitridae, which also includes many other diurnal raptors, such as eagles, buzzards, and harriers, found in the Indian subcontinent, Southeast Asia, and Australia. In 1760, French zoologist Mathurin Jacques Brisson described and illustrated the Brahminy kite in the first volume of his Oiseaux based on a specimen collected in Pondicherry, India. He used the French name L'aigle de Pondichery. The brahminy kite was included by the French polymath Georges-Louis Leclerc, Comte de Buffon in his Histoire Naturelle des Oiseaux. It was also illustrated in a hand-coloured plate engraved by François-Nicolas Martinet in the Planches Enluminées D'Histoire Naturelle which was produced under the supervision of Edme-Louis Daubenton to accompany Buffon's text. Neither Brisson nor Buffon included a scientific name but in 1783 the Dutch naturalist Pieter Boddaert coined the binomial name Falco indus in his catalogue of the Planches Enluminées. The brahminy kite is now placed with the whistling kite in the genus Haliastur that was erected by the English naturalist Prideaux John Selby in 1840.
This kite is a familiar sight in the skies of Sri Lanka, Nepal, India, Pakistan, Bangladesh, and southeast Asia and as far south as New South Wales, Australia, through which region it is widespread and resident. They perform seasonal movements associated with rainfall in some parts of their range. They are mainly seen in the plains, but can sometimes occur above 5000 feet in the Himalayas. It is evaluated as being of least concern on the IUCN Red List of Threatened Species. However, the species is on the decline in some parts such as Java. The breeding season in South Asia is from December to April. In southern and eastern Australia, it is August to October, and April to June in the north and west. The nests are constructed of small branches and sticks with a bowl inside and lined with leaves, and are located in various trees, often mangroves. They show considerable site fidelity nesting in the same area year after year. In some rare instances, they have been seen to nest on the ground under trees. A clutch of two dull-white or bluish-white oval eggs measuring 52 x 41 mm is laid. Both parents take part in nest building and feeding, but likely only the female incubates. The incubation period is about 26 to 27 days.
