Grey-headed fish eagle, Icthyophaga ichthyaetus (Horsfield, 1821) of Borneo.

Ichthyophaga ichthyaetus is a piscivorous raptor of lowland tropical Asia, ranging from the Indian subcontinent through mainland Southeast Asia to the Malay Peninsula the Greater Sundas the Philippines and Sulawesi. It is tied to large fresh waters in forested landscapes including sluggish rivers lakes reservoirs and extensive swamps, where it is generally uncommon and patchily distributed. Adults show a grey head with brown upperparts, largely white underparts, and a white tail with a broad dark terminal band; the species builds large stick nests high in riverside trees and forages mainly by watching from a perch and snatching fish from the water surface or just below. The global status is Near Threatened and a continuing decline is inferred from loss and degradation of wetlands, deforestation, overfishing, pollution, and disturbance across its range. The species was described by Horsfield in 1821 and is currently placed in the genus Ichthyophaga rather than Haliaeetus by modern world lists. The generic name combines the Greek ichthys for fish and phagein for to eat, while the specific epithet joins ichthys and aetos meaning eagle, literally fish eagle.