Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
       [Order] Cuculiformes Wagler, 1830 - cuckoos and plantain-eaters
         Family Cuculidae Vigors, 1825 - cuckoos
           Subfamily Phaenicophaeinae
             Genus Piaya Lesson, 1830
               Piaya cayana (C. Linnaeus, 1766) - squirrel cuckoo
                 01 Piaya cayana mexicana (Swainson, 1827)
                 02 Piaya cayana thermophila Sclater, 1860
                 03 Piaya cayana nigricrissa (Cabanis, 1862)
                 04 Piaya cayana mehleri Bonaparte, 1850
                 05 Piaya cayana mesura (Cabanis & Heine, 1863)
                 06 Piaya cayana circe Bonaparte, 1850
                 07 Piaya cayana cayana (Linnaeus, 1766)
                 08 Piaya cayana insulana Hellmayr, 1906
                 09 Piaya cayana obscura Snethlage, 1908
                 10 Piaya cayana hellmayri Pinto, 1938
                 11 Piaya cayana pallescens (Cabanis & Heine, 1863)
                 12 Piaya cayana cabanisi Allen, 1893
                 13 Piaya cayana macroura Gambel, 1849
                 14 Piaya cayana mogenseni Peters, 1926