Eric Baccega / Head portrait of Dani man with head-dress and nose adornment made of bone, Baliem valley, West Papua, former Irian-Jaya, Indonesia, August 2002

Wild Wonders of Europe / Hamblin / Konik horse skull, Oostvaardersplassen, Netherlands, June 2009

Mark Bowler / Isula / Bullet ant (Paraponera clavata) close-up showing mandibles, Peru

Anup Shah / Marabou storks (Leptoptilos crumeniferus) and White backed vultures (Gyps africanus) scavenging on a Hippopotamus (Hippopotamus amphibius) carcass, Maasai Mara National Reserve, Kenya, March

Wild Wonders of Europe / Elander / Bearded vulture (Gypaetus barbatus) carrying hoof in its beak, Serra de Beumort, Gerri de la Sal, Catalonia, Spain, November 2008

Christian Ziegler / Plantation Glass Frog (Hyalinobatrachiumácolymbiphyllum) is nearly transparent including the bones, only digestive tract is visible, Barro Colorado Island, Panama

Pete Oxford / Harpy eagle (Harpia harpyja) female brings large twig to line nest,probably to bury old bones and carcasses. Aguarico river drainage system. Amazon Rainforest, Ecuador. Critically endangered

Pete Oxford / Skull of Orca / Killer whale {Orcinus orca}. Falkland Islands.

Staffan Widstrand / Walrus cemetery with discarded bones, Mys Geka, Siberia, Russia

Richard Du Toit / Spotted hyaena {Crocuta crocuta} with Buffalo bone. Moremi WR Botswana

Jabruson / African elephant bones, from ivory poaching. Kenya, Tsavo National Park

John Cancalosi / Fossil of Snapping turtle juvenile {Chelydridae} Eocene period, Wyoming, USA