Royal flycatcher

The specific epithet of the type species, coronatus, and the common name of all the species in this genus, royal flycatcher, refer to the striking, colourful crest,[2] which is seen displayed very rarely,[2] except after mating, while preening, in courtship as well as being handled.[2]

The genus name Onychorhynchus comes from the Greek words ὄνυξ onyx "nail" and ρυγχος rhynkhos "bill".[3]

The International Ornithological Committee (IOC) and BirdLife International's Handbook of the Birds of the World (HBW) places four species in the genus:[1][4]

Image	Scientific name	Common Name	Distribution
	Onychorhynchus coronatus	Amazonian royal flycatcher	Amazon basin in northern Bolivia, eastern Peru, eastern Ecuador, eastern Colombia, Venezuela, the Guianas, and northern and western Brazil
	Onychorhynchus mexicanus	Northern royal flycatcher	Mexico, south through most of Central America, to northwestern Colombia and far western Venezuela
	Onychorhynchus occidentalis	Pacific royal flycatcher	Western Ecuador and far northwestern Peru
	Onychorhynchus swainsoni	Atlantic royal flycatcher	Atlantic forest in southeastern Brazil

The North American and South American Classification Committees of the American Ornithological Society (AOS) treat the genus as having one species, royal flycatcher (Onychorhynchus coronatus), with four subspecies. They place it in family Onychorhynchidae with four other species of two genera that the IOC and HBW include in Tityridae. The Clements taxonomy also treats the royal flycatcher as one species with four subspecies. It places that species, the same four additional species as the AOS, and the sharpbill (Oxyruncus cristatus) in family Oxyruncidae, which the AOS reserves for the sharpbill alone.[5][6][7]