Atlantic Royal Flycatcher

The Atlantic royal flycatcher (Onychorhynchus swainsoni) is a passerine bird that most taxonomic systems place in the Onychorhynchidae family. It is endemic to Brazil. == Taxonomy and systematics == After a complicated history (which see here), the International Ornithological Committee (IOC) and the Clements taxonomy placed the Atlantic royal flycatcher and the tropical royal flycatcher (O. coronatus) in family Onychorhynchidae. However, the Atlantic royal flycatcher's taxonomy remains unresolved. The North and South American Classification Committees of the American Ornithological Society (AOS) combine the Atlantic and tropical royal flycatchers as the widespread royal flycatcher (O. coronatus sensu lato). Like the IOC and Clements the AOS places O. coronatus in family Onychorhynchidae, and the three systems include other species in that family. (The South American committee is seeking a proposal for reevaluation of the taxa.) BirdLife International's Handbook of the Birds of the World (HBW) treats the Atlantic and tropical royal flycatchers as four species and retains them in family Tityridae where the IOC and Clements had earlier placed them. The Atlantic royal flycatcher is monotypic. == Description == The Atlantic royal flycatcher is 16 to 16.5 cm (6.3 to 6.5 in) long. One specimen weighed 23.5 g (0.83 oz). This large-billed…