| Noun | 1. | order Passeriformes - largest order of birds comprising about half the known species; rooks; finches; sparrows; tits; warblers; robins; wrens; swallows; etc.; the four suborders are Eurylaimi and Tyranni and Menurae and Oscines or Passeres animal order - the order of animals Aves, class Aves - (ornithology) the class of birds passeriform bird, passerine - perching birds mostly small and living near the ground with feet having 4 toes arranged to allow for gripping the perch; most are songbirds; hatchlings are helpless Oscines, Passeres, suborder Oscines, suborder Passeres - two names for the suborder of typical songbirds Menurae, suborder Menurae - lyrebirds and scrubbirds Eurylaimi, suborder Eurylaimi - broadbills suborder Tyranni, Tyranni - New World flycatchers; antbirds; oven birds; woodhewers Clamatores, suborder Clamatores - used in some classification systems; a suborder or superfamily nearly coextensive with suborder Tyranni; Passeriformes having relatively simple vocal organs and little power of song; clamatorial birds family Troglodytidae, Troglodytidae - wrens |