Imperium naturæ C. Linnaeus, 1758 - nature
   Mundus Plinius - physical world
     naturalia - natural bodies
       Regnum Animale C. Linnaeus, 1758 - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
           Order Passeres Linnaeus, 1758 see Suborder Passeres (C. Linnaeus, 1758) C. Linnaeus, 1766
             Genus Alauda Linnaeus, 1758 - skylark
               1 Alauda arvensis Linnaeus, 1758 - skylark
               2 Alauda pratensis Linnaeus, 1758 see Anthus pratensis (C. Linnaeus, 1758)
               3 Alauda arborea Linnaeus, 1758 see Lullula arborea (C. Linnaeus, 1758)
               4 Alauda campestris Linnaeus, 1758 see Anthus campestris (C. Linnaeus, 1758)
               5 Alauda trivialis Linnaeus, 1758 see Anthus trivialis (C. Linnaeus, 1758)
               6 Alauda cristata Linnaeus, 1758 see Galerida cristata (C. Linnaeus, 1758)
               7 Alauda spinoletta Linnaeus, 1758 see Anthus spinoletta (C. Linnaeus, 1758)
               8 Alauda alpestris Linnaeus, 1758 see Eremophila alpestris (C. Linnaeus, 1758)
               9 Alauda magna Linnaeus, 1758 see Sturnella magna (C. Linnaeus, 1758)