Nonnula frontalis (grey-cheeked nunlet) | CLASSIFICATION

Kingdom Animalia (animals)
- Eumetazoa (metazoans)
  - Bilateria (bilaterally symmetrical animals)
    - Deuterostomia (deuterostomes)
      - Phylum Chordata (chordates)
        
        Craniata (craniates)
        
        Subphylum Vertebrata (vertebrates)
        
        Superclass Gnathostomata (jawed vertebrates)
        
        Euteleostomi (bony vertebrates)
        
        Class Sarcopterygii (lobe-finned fishes and terrestrial vertebrates)
        
        Tetrapoda (tetrapods)
        
        Amniota (amniotes)
        
        Class Reptilia (turtles, snakes, lizards, and relatives)
        
        Class Aves (birds)
        
        Subclass Neognathae (neognath birds)
        
        Infraclass Neoaves (modern birds)
        
        Order Galbuliformes
        
        Family Bucconidae (puffbirds)
        
        Genus Nonnula
        
        Species Nonnula frontalis (grey-cheeked nunlet)
        
        Subspecies Nonnula frontalis frontalis
        
        Subspecies Nonnula frontalis pallescens
        
        Subspecies Nonnula frontalis stulta