Position in a system
species
Blue-grey Gnatcatcher
Polioptila caerulea (Linnaeus, 1766)
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Unikonta |
| system | Opisthokonta Cavalier-Smith, 1987 |
| kingdom | Animalia Linnaeus, 1758 - animals |
| subregnum | Eumetazoa Butschli, 1910 |
| divisio | Bilateria Hatschek, 1888 |
| subdivisio | Deuterostomia - deuterostomes |
| phylum | Chordata Bateson, 1885 - chordates |
| subphylum | Vertebrata Cuvier, 1812 - vertebrates |
| infraphylum | Gnathostomata Zittel, 1879 - jawed vertebrates |
| superclassis | Tetrapoda Gaffney, 1979 - four-limbed vertebrates |
| class | Aves Linnaeus, 1758 - birds |
| subclass | Ornithurae Haeckel, 1866 |
| infraclass | Neornithes Haeckel, 1866 |
| superorder | Neognathae Pygraft, 1900 |
| order | Passeriformes Linnaeus, 1758 - perching birds |
| family | Polioptilidae Baird, 1858 - gnatcatchers |
| genus | Polioptila Sclater, 1855 |
| species | Polioptila caerulea (Linnaeus, 1766) - Blue-grey Gnatcatcher |
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