The Brown Fish Owl, Bubo zeylonensis or Ketupa zeylonensis, is an owl. This species is a part of the family known as typical owls, Strigidae, which contains most species of owl. The Brown Fish Owl and three related species were previously placed in the genus Ketupa; mtDNA cytochrome b sequence data is equivocal on which genus name is applied for this species. This is a large (55cm) owl. The upperparts are reddish brown, heavily streaked with black or dark brown. The underparts are buff with brown streaking. The eyes are yellow, and there are prominent "ears". Sexes are similar. This species is a resident breeder in most of tropical south Asia from Pakistan, through India to south China; west of its main range, it is patchily distributed to the northern Levant. Its habitat is open wooded country, lowland forest and plantations, always near water.