Piotr Naskrecki / Yellow-billed Stork (Mycteria ibis) pair fighting, Gorongosa National Park, Mozambique

Sean Viljoen / African openbill (Anastomus lamelligerus) feeding, Khwai River, Moremi Game Reserve, Botswana.

Jen Guyton / African open-billed stork (Anastomus lamelligerus) sitting on a nest at the edge of the floodplain in Gorongosa National Park, Mozambique

Tony Heald / Open-billed stork (Anastomus lamelligerus) feeding on a water snail at sunrise. Chobe National Park, Botswana.

Ann & Steve Toon / Openbill stork (Anastomus lamelligerus), Chobe river, Botswana, September

Wim van den Heever / Yellow-billed stork (Mycteria ibis) portrait with storm clouds in the background and a flock of Open billed storks flying past (Anastomus lamelligerus) Zimanga Private Game Reserve, South Africa.

Wim van den Heever / African open bill (Anastomus lamelligerus) in flight with morning sunlight. Chobe National Park Botswana.

Neil Aldridge / African openbill (Anastomus lamelligerus) perched on the branch of a dead tree, Zibadianja Lagoon, Selinda Reserve, northern Botswana.

Neil Aldridge / African openbill (Anastomus lamelligerus) searching for food in the shallows of the Chobe River, Chobe National Park, Botswana.

Neil Aldridge / African openbill (Anastomus lamelligerus) walking on floating vegetation, Chief's Island, Okavango Delta, northern Botswana.

Bruno D'Amicis / African opennbill (Anastomus lamelligerus) juvenile birds in rookery, Tana Mtsili island. Lake Tana Biosphere Reserve, Ethiopia.

Bruno D'Amicis / African opennbill (Anastomus lamelligerus) juvenile birds in rookery, Tana Mtsili Island, Lake Tana Biosphere Reserve, Ethiopia.

Bruno D'Amicis / African opennbill (Anastomus lamelligerus) juvenile bird in rookery, Tana Mtsili Island, Lake Tana Biosphere Reserve, Ethiopia.

Bruno D'Amicis / African openbill (Anastomus lamelligerus) in flight. Jimma marshlands, Lake Tana Biosphere Reserve, Bahir Dar. Ethiopia.

Bruno D'Amicis / African openbill (Anastomus lamelligerus) in flight, Lake Tana Biosphere Reserve, Bahir Dar, Ethiopia.

Denis-Huot / Open-billed stork (Anastomus lamelligerus) displaying, Masai Mara Game Reserve, Kenya, October.

Richard Du Toit / Yellow-billed Stork (Mycteria ibis) pair courting, Limpopo, South Africa

Pete Oxford / Yellow-billed Stork (Mycteria ibis) feeding, Kruger National Park, South Africa

Sergey Gorshkov / Saddle-billed Stork (Ephippiorhynchus senegalensis) taking flight, Botswana

Richard Du Toit / Saddle-billed Stork (Ephippiorhynchus senegalensis) male feeding in wetland, Chobe National Park, Botswana

Richard Du Toit / Yellow-billed Stork (Mycteria ibis) landing, Chobe River, Namibia

Richard Du Toit / Yellow-billed Stork (Mycteria ibis) spreading wings, Namibia

Richard Du Toit / Yellow-billed Stork (Mycteria ibis) adult standing in nest, stretching its wings, Khwai River, Botswana

Richard Du Toit / Saddle-billed Stork (Ephippiorhynchus senegalensis) catching fish, Moremi Wildlife Reserve, Botswana

Ole Jorgen Liodden / African openbill storks (Anastomus lamelligerus lamelligerus) group roosting in tree, silhouetted on sunset, Okavango, Botswana.

Cyril Ruoso / Yellow-billed Stork (Mycteria ibis) pair fighting, Ruvubu National Park, Burundi

Murray Cooper / Yellow-billed Stork (Mycteria ibis) displaying, Kruger National Park, South Africa

Ann & Steve Toon / African openbill (Anastomus lamelligerus) feeding in shallow water, Chobe National Park, Botswana.

Ann & Steve Toon / African openbill (Anastomus lamelligerus) taking flight from water's edge, Chobe National Park, Botswana.

Richard Flack / African openbill stork (Anastomus lamelligerus) wading in shallow water at waterhole searching for food, Kruger National Park, South Africa.

Loic Poidevin / African openbill stork (Anastomus lamelligerus) carrying clam in beak on river bank. Uganda. August.

Loic Poidevin / African openbill stork (Anastomus lamelligerus) stretching its wings. Uganda. July.

Charlie Hamilton-James / Conservationists rescuing two African openbill storks (Anastomus lamelligerus) used as decoys to attract other storks to poisoned bait, Bunyala Rice Scheme, Kenya, Africa. November, 2015.

Charlie Hamilton-James / African openbill stork (Anastomus lamelligerus) on the ground, possibly with legs tied and wings clipped to stop escape, used as decoy to attract other storks to poisoned bait, the line of snails on t...

Charlie Hamilton-James / Conservationists rescuing African openbill stork (Anastomus lamelligerus) with legs tied up, used as decoy to attract other storks to poisoned bait, Bunyala Rice Scheme, Kenya, Africa. November, 2015.

Charlie Hamilton-James / African openbill stork (Anastomus lamelligerus) with beak tied up, used as decoy to attract other storks to poisoned bait, Bunyala Rice Scheme, Kenya, Africa.

Tim Laman / Flock of African open-billed storks (Anastomus lamelligerus) in flight, Lake Manyara National Park, Tanzania.

Roland Seitre / African open-bill stork (Anastomus lamelligerus) portrait. August. Captive animal.

Guy Edwardes / Openbilled stork (Anastomus lamelligerus) in flight. Savuti, Chobe National Park, Botswana.

Guy Edwardes / Openbilled stork (Anastomus lamelligerus) hunting in wetland. Savuti, Chobe National Park, Botswana.

Tony Heald / Open-billed stork (Anastomas lamelligerus) silhouetted in flight, Chobe National Park, Botswana.