Shane Gross / American crocodile (Crocodylus acutus) with open mouth amongst Seagrass (Alismatales). Gardens of the Queen National Park, Cuba.

David Tipling / Bearded vulture (Gypaetus barbatus) adult swallowing leg bone along with hoof, Spanish Pyrenees, July. This bird swallowed five of these leg bones whole, they have the ability to dissolve the bone in...

Roy Mangersnes / Marine iguanas (Amblyrhynchus cristatus) basking on rock next to skeleton of one which starved to death. Unusually warm El Nino waters have killed a lot of the algae which is the food for these iguana...

Pete Oxford / Head-hunted human skulls, collected by the Konyak Naga tribe, North East India, October 2014.

Laurent Geslin / Skull and teeth of Blue monkey {Cercopithecus mitis}

Laurent Geslin / Skeleton of a Sparrowhawk {Accipiter nisus}

Juan Carlos Munoz / Fossil of extinct perch fish (Priscacara sp) from the Eocene period, Wyoming, USA

Roy Mangersnes / Female Polar bear (Ursus maritimus) and cub on coastal rocks near Whale skeleton, Spitsbergen, Svalbard, Norway, August

Juergen Freund / Skull cave in Milne Bay. These skulls are said to be heads of decapitated enemies of the people living here in the olden days. Papua New Guinea, October 2008.

Steve Nicholls / Skeleton of a Python (Python sp)

Juergen Freund / Very old human skulls on a ledge in the karst limestone walls of a Raja Ampat island. Raja Ampat, West Papua, Indonesia, February 2010

Anup Shah / White-backed vulture (Gyps africanus) and Marabou stork (Leptoptilos crumeniferus) feeding from the carcass of a Cape buffalo (Cyncerus caffer) covered with flies - wide angle perspective. Masai Mara...