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] Ciconiiformes Bonaparte, 1854
Family Ardeidae Leach, 1820 - herons, bitterns and egrets
Subfamily Botaurinae Bock, 1956
Genus Ixobrychus Billberg, 1828
Ixobrychus exilis (Gmelin, 1789) - least bittern
Ixobrychus exilis peruvianus Bond, 1955