Tony Heald / Hippopotamus {Hippopotamus amphibius} territorial defense at water edge, Chobe national park, Botswana.
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Anup Shah / Hippos courting {Hippopotamus amphibius} Masai Mara NR, Kenya.
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Winfried Wisniewski / Hippopotamus (Hippopotamus amphibius) in territorial display, Mkhuze Game Reserve, KwaZulu-Natal, South Africa
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Tony Heald / Hippopotamus (Hippopotamus amphibius) splashing in pool in evening light. Mana Pools National Park, Zimbabwe.
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Guy Edwardes / Hippopotamus (Hippopotamus amphibius) in Chobe River, Botswana.
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Mick Jenner / Water vole (Arvicola amphibius) feeding on plastic, West Sussex, England, UK.
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Bence Mate / Hippopotamus (Hippopotamus amphibius) at waterhole at night, Mkuze, South Africa Third place in the Nature Portfolio category of the World Press Photo Awards 2017.
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Terry Whittaker / Water vole (Arvicola amphibius) swimming underwater, dragging nesting material back to its burrow, Kent, England, UK. October.
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Terry Whittaker / Water vole (Arvicola amphibius) feeding on Yellow flag iris (Iris pseudacorus) seed pods, Kent, England, UK. October.
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Neil Aldridge / Hippopotamus (Hippopotamus amphibius) charging through the shallows, Chobe River, Chobe National Park, Botswana. Vulnerable species.
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Wim van den Heever / Hippopotamus (Hippopotamus amphibius) out of the water, peering around vegetation. Okavango Delta, Botswana.
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Pedro Narra / Hippopotamus (Hippopotamus amphibius) at water surface, Bijagos Archipelago Biosphere Reserve, Guinea Bissau,
