Klein & Hubert / Nile crocodile (Crocodylus niloticus) close up of jaw and teeth, Chobe River, Botswana, Africa.

Guy Edwardes / African elephant (Loxodonta africana) with Egret (Ardeidae sp) on back wtih tourists watching from boat in background. Chobe River, Botswana. 2017.

Guy Edwardes / Hippopotamus (Hippopotamus amphibius) in Chobe River, Botswana.

Guy Edwardes / Allen's / Lesser gallinule (Porphyrio alleni) walking on waterlilies, Chobe River, Botswana.

Guy Edwardes / Black crake (Amaurornis flavirostra) standing on lily pads, Chobe River, Botswana.

Tony Heald / African elephant (Loxodonta africana) feeding on grasses, Chobe River, Chobe National Park, Botswana. May.

Christophe Courteau / African elephants (Loxodonta africana) swimming across Chobe River, trunks raised above surface for breathing, Chobe National Park, border between Botswana and Namibia.

Neil Aldridge / African fish eagle (Haliaeetus vocifer) standing on the banks of the Chobe River, Chobe National Park, Botswana.

Neil Aldridge / Portrait of an African darter (Anhinga rufa) on the Chobe River, Chobe National Park, Botswana.

Neil Aldridge / Yellow-billed stork (Mycteria ibis) catching a young barbel or catfish in the shallows of the Chobe River, Chobe National Park, Botswana.

Neil Aldridge / Yellow-billed oxpecker (Buphagus africanus) perched on the back of an African buffalo (Syncerus caffer) on the banks of the Chobe River, Chobe National Park, Botswana.

Neil Aldridge / Pied kingfisher (Ceryle rudis) erupts from the water after an unsuccessful dive into the Chobe River, Chobe National Park, Botswana.

Neil Aldridge / Nile crocodile (Crocodylus niloticus) resting in the sun on a grassy island in the middle of the Chobe River, northern Botswana.

Neil Aldridge / Hippopotamus (Hippopotamus amphibius) charging through the shallows, Chobe River, Chobe National Park, Botswana. Vulnerable species.

Neil Aldridge / African elephant (Loxodonta africana) baby and its mother are reflected in the waters of the Chobe River, Chobe National Park, Botswana. Vulnerable.

Neil Aldridge / African elephant (Loxodonta africana) walking in front of a setting sun on floodplains lining the Chobe River, northern Botswana. Vulnerable species.

Neil Aldridge / African elephant (Loxodonta africana) dust bathing on floodplains, Chobe River, Botswana. Vulnerable species.

Neil Aldridge / African buffalo (Syncerus caffer) standing on the banks of the Chobe River, Chobe National Park, Botswana.

Neil Aldridge / Mud-covered face of bull African buffalo (Syncerus caffer) with a cateract in one eye, on the banks of the Chobe River, Chobe National Park, Botswana.

Neil Aldridge / Chacma baboon (Papio ursinus) baby riding on top of its mother on the banks of the Chobe River, Chobe National Park, Botswana.

Neil Aldridge / African skimmer (Rynchops flavirostris) flying low over the Chobe River, skimming the water, at sunset, Chobe National Park, Botswana.

Neil Aldridge / African skimmer (Rynchops flavirostris) resting on a sandbank in the middle of the Chobe River between Botswana and Namibia.

Wim van den Heever / Black heron (Egretta ardesiaca) fishing and using wings to create an area of shade to attract fish, on the banks of the Chobe River, Botswana.

Ann & Steve Toon / Cape buffalo (Syncerus caffer) crossing the Chobe River, followed by swarm of flies, Chobe Game Reserve, Botswana, Africa.

Lou Coetzer / African elephant (Loxodonta africana) cow reassuring young calf with trunk, Chobe River, Botswana, October, Vulnerable species.

Lou Coetzer / African elephant (Loxodonta africana) adult and juvenile silhouetted, Chobe River, Botswana, August, Vulnerable species.

Lou Coetzer / African fish eagle (Haliaeetus vocifer) in flight with Catfish in claws, Chobe River, Botswana.

Laurent Geslin / Male African elephant (Loxodonta africana) crossing the Chobe river, Botswana

Tony Heald / Tourists watching African elephants {Loxodonta africana} from boat on the Chobe River, Chobe NP, Botswana, Africa

Richard Du Toit / Pied kingfisher pair courtship display {Ceryle rudis} Botswana female on left, male on right.

Sharon Heald / Hippo charging into water {Hippopotamus amphibius} Chobe NP, Botswana

Sharon Heald / Hippo charging into water {Hippopotamus amphibius} Chobe NP, Botswana

Pete Oxford / African elephant drinks in river at sunset, Chobe National Park, Botswanna

Tony Heald / African Elephant spraying muddy water over itself. Botswana Chobe NP, Africa

Richard Du Toit / African Elephant (Loxodonta africana) group in the Chobe River, Botswana

Paul Souders/ Worldfoto / Black Heron (Egretta ardesiaca) canopy hunting, Chobe River, Chobe National Park, Botswana

Winfried Wisniewski / African Skimmer (Rynchops flavirostris) skimming, Chobe River National Park, Botswana

Winfried Wisniewski / African Skimmer (Rynchops flavirostris) pair fighting in flight, Chobe River National Park, Botswana

Winfried Wisniewski / African Skimmer (Rynchops flavirostris) pair fighting in flight, Chobe River National Park, Botswana

Winfried Wisniewski / African Elephant (Loxodonta africana) and tourist boat, Chobe River, Chobe National Park, Botswana

Winfried Wisniewski / Yellow-billed Stork (Mycteria ibis) foraging in the Chobe River, Chobe National Park, Botswana

Winfried Wisniewski / Yellow-billed Stork (Mycteria ibis) foraging in the Chobe River, Chobe National Park, Botswana

Winfried Wisniewski / Yellow-billed Stork (Mycteria ibis) foraging in the Chobe River, Chobe National Park, Botswana

Winfried Wisniewski / African Skimmer (Rynchops flavirostris) flying over the Chobe River, Chobe National Park, Botswana

Winfried Wisniewski / African Elephant (Loxodonta africana) herd at edge of Chobe River, Chobe National Park, Botswana

Guy Edwardes / Western yellow wagtail (Motacilla flava) perched on reed, Chobe River, Chobe National Park, Botswana.

Klein & Hubert / Chacma baboon (Papio ursinus) sitting on dead trunk at the river's edge, Chobe National Park, Botswana, Africa.

Klein & Hubert / Chacma baboons (Papio ursinus) drinking at river's edge, Chobe National Park, Botswana, Africa.