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

Bence Mate / White-tailed Eagle (Haliaeetus albicilla) flying, with Great egret (Ardea alba) in the foreground, Lake Csaj, Pusztaszer, Hungary. February. Winner of the Portfolio category of the Terre Sauvage Natur...

Neil Aldridge / Goliath heron (Ardea goliath) standing in the waters, Lake Panic, Kruger National Park, South Africa.

Gary Bell/ Oceanwide / Giant Shovelnose Ray (Glaucostegus typus) buried in sand, Heron Island, Great Barrier Reef, Queensland, Australia

John Shaw / Striated heron (Butorides striata) standing on giant Amazon waterlily leaf (Victoria amazonica). Porto Jofre, Pantanal, Brazil. September.

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.

Sean Viljoen / Slow motion clip of an African Fish eagle (Haliaeetus vocifer) attempting to catch a Goliath heron (Ardea goliath), Moremi Game Reserve, Botswana.

Kim Taylor / Goliath Heron (Ardea goliath) among Red mangrove (Rhizophora mangle). Gambia, Africa.

Pedro Narra / Goliath heron (Ardea goliath) with a baby Green Turtle (Chelonia mydas) prey which has just emerge from the nest, Bijagos Islands, Guinea Bissau.

Pedro Narra / Goliath heron (Ardea goliath) with a baby Green Turtle (Chelonia mydas) prey which has just emerge from the nest, Bijagos Islands, Guinea Bissau.

Loic Poidevin / Goliath heron (Ardea goliath) feeding, captive at zoo, native to Africa.