The Genus Pyrocephalus is a group of birds that are commonly known as vermilion flycatchers. This group consists of only one species of birds, the Pyrocephalus rubinus. However, the word "pyrocephalus" is derived from Greek, which means "fiery head". Due to this, there are several synonyms for the word Genus Pyrocephalus, which are frequently used interchangeably. Some of the common synonyms for this Genus are Ruby-crowned Flycatcher, Fire-headed Flycatcher, and Vermilion Tanager. These names are based on physical attributes of the birds like their bright red plumage and their habitats, enabling bird enthusiasts to identify them more efficiently.