Ingo Arndt / Caddisfly (Limnephilidae) case built out of sticks and bark fragments, Germany, November.

Ingo Arndt / Caddisfly (Limnephilus sp.) case built of sticks, wood fragments, seeds, snail shells and plant stems, Germany, November.

Bence Mate / Osprey (Pandion haliaetus) in flight with nesting material, Hungary, July. Nominated in the Telephoto category of the Terre Sauvage Nature Images Awards competition 2015.

Eric Baccega / Men from the Mursi tribe decoratively scaring skin, one man scars the arm of another one by lifting the skin with an acacia spine and cutting it with a razor blade, Ethiopia, March 2015.

Enrique Lopez-Tapia / Woman with stick at the Jumping of the bulls Hamer ceremony. This Hamer ceremony, is a right of passage into manhood for Hamer boys. During the ceremony young female relatives of the boys beg to be wh...

Claudio Contreras / Black-necked stilt (Himantopus mexicanus) reflected in water, Xochimilco wetlands, Mexico City, March

Ole Jorgen Liodden / Mountain gorilla (Gorilla beringei beringei) baby chewing on stick, Virunga, Rwanda.

Ole Jorgen Liodden / Woodpecker finch (Camarhynchus pallidus) using stick as a tool for foraging, Galapagos. Endemic.

Bence Mate / Great reed warbler (Arcocephalus arundinaceus) chick begging for food, with bokeh affect from water, Pusztaszer, Hungary, June.

Eric Baccega / Black flat-coated retriever dog splashing in water and retrieving stick (Canis familiaris)

Enrique Lopez-Tapia / Domestic Asian elephants (Elephas maximas) used for riding safaris with their keepers, Royal Chitwan National Park, Nepal.

Konrad Wothe / Chimpanzee (Pan troglodytes) fishing for ants with stick, Mahale Mountains National Park, Tanzania, East Africa