plural noun
Ty·​ran·​ni·​dae | \ tə̇ˈranəˌdē, tīˈr-\

Definition of Tyrannidae

: a large exclusively American family of birds that are most numerous in South and Central America but well represented in the U.S. and Canada, comprise the tyrant flycatchers, are mostly strictly insectivorous and take their prey on the wing, have a flattened bill often hooked at the tip and usually bristly at the gape, and with the pittas, cotingas, and related birds constitute a superfamily of the suborder Tyranni

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History and Etymology for Tyrannidae

New Latin, from Tyrannus, type genus + -idae

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not constant or steady

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