Systema naturæ - nature Universum - universe see [unranked] Mundus Plinius naturalia - natural bodies Regnum Animale nom. inval. - animal kingdom see Kingdom Animalia Linnaeus, 1758 Class Aves Plinius, nom. inval. - birds see Class Aves Linnaeus, 1758 Order Passeres nom. inval. see Order Passeres Linnaeus, 1758 Genus Hirundo nom. inval. see Genus Hirundo Linnaeus, 1758 1 Hirundo Plinius, nom. inval. 2 Caprimulgus Plinius, nom. inval.