whistling heron (Syrigma sibilatrix) is a medium-sized, often terrestrial heron of South America. It is the only species placed in the genus Syrigma. There are...

traditionally done). However, the position of some genera (e.g. Butorides or Syrigma) is unclear at the moment, and molecular studies have so far suffered from...

Bubulcus Mesophoyx Cladistically included but traditionally excluded taxa Nycticorax Nyctanassa Gorsachius Butorides Agamia Pilherodius Ardeola Syrigma...

Butorides Egretta Gorsachius Nycticorax Nyctanassa Pilherodius †Proardea Syrigma †Zeltornis Zonerodius Botaurinae Botaurus Ixobrychus †Pikaihao Zebrilus...

Butorides Egretta Gorsachius Nycticorax Nyctanassa Pilherodius †Proardea Syrigma †Zeltornis Zonerodius Botaurinae Botaurus Ixobrychus †Pikaihao Zebrilus...

Butorides Egretta Gorsachius Nycticorax Nyctanassa Pilherodius †Proardea Syrigma †Zeltornis Zonerodius Botaurinae Botaurus Ixobrychus †Pikaihao Zebrilus...

Butorides Egretta Gorsachius Nycticorax Nyctanassa Pilherodius †Proardea Syrigma †Zeltornis Zonerodius Botaurinae Botaurus Ixobrychus †Pikaihao Zebrilus...

Butorides Egretta Gorsachius Nycticorax Nyctanassa Pilherodius †Proardea Syrigma †Zeltornis Zonerodius Botaurinae Botaurus Ixobrychus †Pikaihao Zebrilus...

Butorides Egretta Gorsachius Nycticorax Nyctanassa Pilherodius †Proardea Syrigma †Zeltornis Zonerodius Botaurinae Botaurus Ixobrychus †Pikaihao Zebrilus...

Butorides Egretta Gorsachius Nycticorax Nyctanassa Pilherodius †Proardea Syrigma †Zeltornis Zonerodius Botaurinae Botaurus Ixobrychus †Pikaihao Zebrilus...