Cover: Elephants in Tarangire National Park, Tanzania. Photo: Charles and Lara Foley

Cover: A Yemeni man proudly wears his dagger with its priceless rhino horn handle. Photo: Lucy Vigne

Elephant herd, Luangwa Valley, Zambia. Photo: Julian Fennessy

Rhino killed by poachers in Chitwan National Park. Photo: Deepak Acharya

Photo: Michele Menegon. A savannah elephant in a montane forest of the Udzungwa Mountains, Tanzania.

Photo: Brendan Hill. Eastern black rhino (Diceros bicornis ssp. michaeli) at Ol Pejeta Conservancy, Kenya.

A greater one-horned rhino (Rhinoceros unicornis) in Chitwan National Park, Nepal, photographed from elephant back.
Photo: Esmond Martin

Elephants in Chobe National Park, Botswana. Mark Atkinson