- Passeriformes, 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
--1 is a kind of animal order
--1 is a member of Aves, class Aves
--1 has members: