Noun | 1. | ![]() bird genus - a genus of birds superfamily Tyrannidae, Tyrannidae - New World tyrant flycatchers most numerous in Central America and South America but also in the United States and Canada Muscivora-forficata, scissortail, scissortailed flycatcher - grey flycatcher of the southwestern United States and Mexico and Central America having a long forked tail and white breast and salmon and scarlet markings |