Phylum Chordata Bateson, 1885 - chordates
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   Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
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     Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
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       Superorder Neognathae Pycraft, 1900 see Cohort Neognathae Pycraft, 1900
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         Order Strigiformes Wagler, 1830 - owls
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           Family Strigidae Vigors, 1825 - owls
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             Subfamily Buboninae Vigors, 1825 - normal owls see Subfamily Striginae Vigors, 1825
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               Genus Strix Linnaeus, 1758
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                 Strix occidentalis (Xántus de Vesey, 1860) - spotted owl
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