Natura - nature actualia - actual entities Mundus Plinius - physical world 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 "Passeres" nom. inval.] see Order Passeres Linnaeus, 1758 [Genus "Parus" nom. inval.] see Genus Parus Linnaeus, 1758 1 "Parus" nom. inval. 2 "Parus caudatus" nom. inval. 3 "Parus cristatus" nom. inval.