One of numerous species of birds that feed upon insects, which they take on the wing. [1913 Webster
" The true flycatchers of the Old World are Oscines, and belong to the family Muscicapidæ, as the spotted flycatcher (Muscicapa grisola). The American flycatchers, or tyrant flycatchers, are Clamatores, and belong to the family Tyrannidæ, as the kingbird, pewee, crested flycatcher (Myiarchus crinitus), and the vermilion flycatcher or churinche (Pyrocephalus rubineus). Certain American flycatching warblers of the family Sylvicolidæ are also called flycatchers, as the Canadian flycatcher (Sylvania Canadensis), and the hooded flycatcher (S. mitrata). See Tyrant flycatcher."