Aves > Pelecaniformes > Ardeidae > Ardeinae > Nyctanassa > Nyctanassa violacea > Nyctanassa violacea gravirostris

subspecies: Nyctanassa violacea gravirostris (Yellow-crowned Night-Heron, )

Annotation: Not recognized by Peters (1979) or Howard and Moore (2003), but included in treatments by del Hoyo et al. (1992), Clements (2007), and BNA.