Luke Massey / Giant otter (Pteronura brasiliensis) feeding on a catfish (Loricariidae) with Cocoi heron (Ardea cocoi) scavenging remnants, Rio Cuiaba, Brazil

Gabriel Rojo / Cocoi heron (Ardea cocoi) standing in tree. Pantanal, Mato Grosso, Brazil.

Bernard Castelein / Amazon kingfisher, (Chloroceryle amazona) female, andwith Cocoi heron (Ardea cocoi) in background, Municipal protected area of Pampas del Yacuma, Bolivia

Bernard Castelein / Cocoi Heron (Ardea cocoi) sunbathing , Pampas del Yacuma Protected Area, Bolivia

Franco Banfi / Cocoi heron (Ardea cocoi) displaying, Pantanal wetlands, Mato Grosso, Brazil

Luke Massey / Giant otter (Pteronura brasiliensis) feeding on a catfish (Loricariidae) with Cocoi heron (Ardea cocoi) scavenging remnants, Rio Cuiaba, Pantanal, Brazil.

Luke Massey / Giant otter (Pteronura brasiliensis) feeding on a catfish (Loricariidae) with Cocoi heron (Ardea cocoi) scavenging remnants, Rio Cuiaba, Pantanal, Brazil.

Luke Massey / Cocoi heron (Ardea cocoi) with Catfish prey (Loricariidae) attacked by Black collared hawk (Busarellus nigricollis) Pantanal, Brazil..

Luke Massey / Cocoi heron (Ardea cocoi) with Catfish (Loraciidae) attacked by a Black collared hawk (Busarellus nigricollis) Pantanal, Brazil..

Luke Massey / Cocoi heron (Ardea cocoi) with Catfish (Loraciidae) Pantanal, Brazil..

Luke Massey / Cocoi heron (Ardea cocoi) reflected in water, Pantanal, Brazil.

Sylvain Cordier / Cocoi heron (Ardea cocoi), fishing, Pantanal, Mato Grosso, Brazil.