Ben Cranke / Southern Screamer (Chauna torquata) perched on a tree top, vocalising, Mato Grosso, Pantanal, Brazil. August.

Ben Cranke / Southern Screamer (Chauna torquata) Mato Grosso, Pantanal, Brazil. August.

Nick Garbutt / Southern Screamer or Crested Screamer (Chauna torquata) in flight and landing on river-side tree. Taiama Ecological Reserve, Paraguay River, western Pantanal, Brazil. Digital composite

Ben Lascelles / Southern Screamer (Chauna torquata). In flight. Esteros de Ibera / Ibera Wetlands Provincial Park, Argentina. October

Ben Lascelles / Southern Screamer (Chauna torquata). In flight, 'screaming'. Esteros de Ibera / Ibera Wetlands Provincial Park, Argentina. October

Ben Lascelles / Southern Screamer (Chauna torquata) in flight. Esteros de Ibera / Ibera Wetlands Provincial Park, Argentina. October

Ben Lascelles / Southern / Crested Screamer (Chauna torquata) parental pair with chicks at nest. Ibera Wetlands Provincial Park, Argentina, October.

Edwin Giesbers / Southern / Crested screamer (Chauna torquata) portrait, captive

Edwin Giesbers / Southern / Crested screamer (Chauna torquata) close up of feathers, captive

Edwin Giesbers / Southern / Crested screamer (Chauna torquata) head portrait, captive

Luiz Claudio Marigo / A pair of Southern / Crested Screamer (Chauna torquata) walking through grass. The Pantanal wetlands of Mato Grosso State, Brazil, October.

Luiz Claudio Marigo / Southern / Crested Screamer (Chauna torquata) walking across grass. The Pantanal wetlands of Mato Grosso State, Brazil, October.