Natura - nature Universum - universe see [unranked] Mundus Plinius naturalia - natural bodies Animale Regnum nom. inval. - animal kingdom see Kingdom Animalia Linnaeus, 1758 Class Aves Plinius, nom. inval. - birds see Class Aves Linnaeus, 1758 Order Accipitres Plinius, nom. inval. see Order Accipitres Linnaeus, 1758 Genus Psittacus nom. inval. see Genus Psittacus Linnaeus, 1758