Matthew Maran / Goat willow (Salix caprea) felled by a Eurasian beaver (Castor fiber) with teeth marks The riverside tree will resprout with new shoots supplying a source of food for the beavers for years to come. De...

Nick Upton / Eurasian beaver (Castor fiber) male using its teeth to strip bark from a Willow tree (Salix sp.) in woodland enclosure at night, Devon Beaver Project, run by Devon Wildlife Trust, Devon, UK, April. Ta...

Philippe Clement / Roe deer (Capreolus capreolus) antler, showing teeth marks where it has been gnawed upon by mice, squirrels and other rodents for Calcium, Magnesium and other minerals, UK

Philippe Clement / Close-up of the shed antler of a Roe deer (Capreolus capreolus), showing teeth marks where it has been gnawed upon by mice, squirrels and other rodents for Calcium, Magnesium and other minerals, UK

Philippe Clement / Close-up of the shed antler of a Roe deer (Capreolus capreolus), showing teeth marks where it has been gnawed upon by mice, squirrels and other rodents for Calcium, Magnesium and other minerals, UK

Philippe Clement / Roe deer (Capreolus capreolus) antler, showing teeth marks where it has been gnawed upon by mice, squirrels and other rodents for Calcium, Magnesium and other minerals, UK

Jabruson / 'Epombepombe' (Strychos sp) ball-like forest fruit frequently eaten by the Agile Mangabey (Cercocebus agilis). This fruit shows signs of an attempt to access the fruit with bite marks scoring the hard...

Christophe Courteau / Mountain gorilla (Gorilla beringei) silverback teeth marks on Eucalyptus tree, the gorilla has eaten the tree gum while he was outside of the National Park, Volcanoes National Park, Rwanda

Juergen Freund / Boulder coral with Parrotfish (Scaridae) teeth bite marks. North Raja Ampat, West Papua, Indonesia.

Suzi Eszterhas / Gray Whale (Eschrichtius robustus) with tooth marks from attacks by killer whales, San Ignacio Lagoon, Baja California, Mexico

Niall Benvie / European beaver teeth marks on Alder {Castor fiber} Latvia

Philippe Clement / Close-up of American beaver teeth marks in tree trunk {Castor canadensis} Grand Teton NP, Wyoming, USA.

Roberto Rinaldi / Crocodile Man, scarification from the wagan initiation ceremony into manhood. The skin on the chest, back and buttocks of the initiate is cut with a bamboo sliver. The scars, when healed, represent th...

Michel Roggo / Tree felled by beavers,with marks of their teeth on it, near a beaver lodge, underwater. Vieille Thielle (Alte Zihl), Neuchatel, Switzerland. April. Photographed for The Freshwater Project.

Michel Roggo / Trees felled by beavers, with marks of the teeth, near a Beaver lodge, under water, Vieille Thielle (Alte Zihl), close to Cressier, Canton of Neuchatel, Switzerland. April. Photographed for The Freshw...