Icthyophaga

Icthyophaga (often misspelled as Ichthyophaga, which is a valid genus of flatworms) is a genus of six species of eagles, closely related to the sea eagles in the genus Haliaeetus. In fact, some taxonomic authorities place this genus within Haliaeetus. Both are native to southeastern Asia, from the Indian subcontinent southeast to Sulawesi. They are smaller than the Haliaeetus eagles, though overlapping in size with the smaller species of that genus. They share similar plumage, with grey heads grading into dull grey-brown wings and bodies, and white belly and legs. They differ in tail colour, with the lesser fish eagle having a brown tail, and the grey-headed fish eagle having a white tail with a black terminal band, and also in size, with the lesser fish eagle only about half of the weight of the grey-headed fish eagle.

==Taxonomy== The genus was established by René-Primevère Lesson in 1843, to accommodate a single species, the grey-headed fish eagle, which is therefore considered as the type species. Lesson used two spellings for its name: Icthyophaga and Icthyiophaga, but not Ichthyophaga. Despite this, Erwin Stresemann and Dean Amadon mistakenly referred to this genus as Ichthyophaga in their work, and this erroneous usage persisted for a long time; the name Ichthyophaga actually belongs to an entirely different animal: a prolecithophoran turbellarian parasite of fish which was named by Syromjatnikova in 1949.