Suzi Eszterhas / North American beaver (Castor canadensis) on dam. Martinez, California, USA. June.

Chien Lee / Minden / Stick Insect (Monticomorpha flavolimbata) pair mating in mountains, Bengoh Range, Ecuador

Cyril Ruoso / Chimpanzee (Pan troglodytes) using stick to forage for prey in small tree cavity, Bossou, Guinea

Cyril Ruoso / Chimpanzee (Pan troglodytes) using stick to forage for prey in small tree cavity, Bossou, Guinea

Eric Baccega / Giant panda (Ailuropoda melanoleuca) cub playfuly chewing a bamboo stick. Yuan Meng, first giant panda ever born in France, is now 10 months old and still feeds on his mother's milk, Captive at Beauva...

Mark Raycroft / Cocker Spaniel (Canis familiaris) puppy playing, North America

Bence Mate / Eurasian blackcaps (Sylvia atricapilla) caught on limed stick, Cyprus. Finalist in The Wildlife Photojournalist Award: Single Image Category of the Wildlife Photographer of the Year Awards (WPOY) Com...

Frederique Olivier / Chinstrap penguin (Pygoscelis antarcticus) adding a stick to its nest and fighting with a neighbouring pair, Aitcho Island, South Shetland Islands.

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.

ZSSD / Hawaiian Crow (Corvus hawaiiensis) using stick tool to reach food, native to Hawaii

ZSSD / Hawaiian Crow (Corvus hawaiiensis) using stick tool to reach food, native to Hawaii

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.

Konrad Wothe / Jumping stick grasshopper (Apioscelis bulbosa) Panguana Reserve, Huanuco province, Amazon basin, Peru.

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.

Mark Raycroft / Golden Retriever (Canis familiaris) puppy playing with stick in snow

Floris van Breugel / A view of Pony Tail falls with Devil's Club (Oplopanax horridus) leaves in the foreground in the Columbia River Gorge, Oregon, USA. July 2011.

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)

Alex Hyde / Malayan Jungle Nymph (Heteropteryx dilatata) subadult male, photographed on a white background. Captive, originating form Malaya.

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

Laurent Geslin / Mursi shepherd with his stick, Omo valley, Ethiopia, 2006

Laurent Geslin / Chacma baboon chewing stick (Papio ursinus) Caprivi strip, Namibia

D. Parer & E. Parer-Cook / Woodpecker Finch (Camarhynchus pallidus) using tool to dislodge grub, Santa Cruz Island, Galapagos Islands, Ecuador

D. Parer & E. Parer-Cook / Woodpecker Finch (Camarhynchus pallidus) using tool to dislodge grub, Santa Cruz Island, Galapagos Islands, Ecuador

Peter Cairns / 2020VISION / Osprey (Pandion haliaetus) perched on branch, holding stick in its foot, Cairngorms National Park, Scotland, UK, July.

Roger Powell / Cattle egret (Bubulcus ibis) in flight carrying a large stick to its nest, Guerreiro, Castro Verde, Alentejo, Portugal, May

Fergus Gill / 2020VISION / Tree Sparrow (Passer montanus) Perching on a snow covered branch. Perthshire, Scotland.

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

Mary McDonald / Hanuman Langur / Northern Plains Grey Langur (Semnopithecus entellus) baby playing with a stick by its mother. Kanha National Park, Madhya Pradesh, India.

Mary McDonald / Hanuman Langur / Northern Plains Grey Langur (Semnopithecus entellus) baby playing with a stick by its mother. Kanha National Park, Madhya Pradesh, India.

Jan Hamrsky / Needle Bug / Water Stick Insect (Ranatra linearis) portrait. Europe, August.

Jouan & Rius / Stick insect (Diesbachia tamyris) female with wings open, rainforest, Borneo, Sarawak, Malaysia

Orsolya Haarberg / Eurasian beaver (Castor fiber) demonstrating stick display, territorial behaviour, Telemark, Norway, June

Orsolya Haarberg / Eurasian beaver (Castor fiber) demonstrating stick display, territorial behaviour, Telemark, Norway, June

Orsolya Haarberg / Eurasian beaver (Castor fiber) demonstrating stick display, territorial behaviour, Telemark, Norway, June

Alex Hyde / Close-up of the underside of foot of Leaf-tailed gecko {Uroplatus sikorae} as it walks on vertical glass. The finely divided setae on the toe pads stick the gecko to the smooth surface through van der...

Wild Wonders of Europe / Ziegler / Photographer, Christian Ziegler, with a juvenile African chameleon (Chamaeleo africanus) on a stick, Southern The Peloponnese, Greece, May 2009

Fabio Liverani / Spectacled salamander (Salamandrina terdigitata) by eggs on stick, Acqua Cheta River, Foreste Casentinesi National Park, Italy

Wild Wonders of Europe / Peltomäki / Marsh harrier (Circus aeruginosus) in flight carrying stick for nest, Texel, Netherlands, May 2009

Albert Lleal / Celebes Leaf Insect (Phyllium celebicum), native to southeast Asia

Pete Oxford / Stick insect (Phasma chrysoptera) displaying, Eastern rainforest, MADAGASCAR endemic

Piotr Naskrecki / African Savannah Mantid (Polyspilota aeruginosa) clinging to stick at sunset, Guinea, West Africa

Pete Oxford / Australian Walking Stick (Extatosoma tiaratum) harmless, Australia

Kim Taylor / Stick insect {Phasmid sp.}

Anup Shah / Orang utan playing with stick, (Pongo abelii) Gunung Leuser NP, Indonesia

Anup Shah / Orang utan baby playing with stick, (Pongo abelii) Gunung Leuser NP, Indonesia

Jim Brandenburg / American Beaver (Castor canadensis) with a stick underwater, Minnesota

Rolf Nussbaumer / Ash throated flycatcher {Myiarchus cinerascens} with stick insect prey, Texas, USA

Pete Oxford / Stick insect (Phasmidae) Yasuni NP, Amazon rainforest, Ecuador

Gerry Ellis / Stick Insect on leaf, Papua New Guinea

Jim Brandenburg / Giant Walking Stick (Megaphasma dentricus) camouflaged among prairie grasses, North Dakota

Norbert Wu / Remora (Remora remora) top of head modified with plates to stick onto animals, worldwide

Gertrud & Helmut Denzau / Male domestic Bactrian camel {Camelus bactrianus} rope through nose to controll it, Gobi desert, Mongolia

Anup Shah / Chimpanzee chewing stick

Pete Oxford / Stick insect feeding on leaf, Amazon rainforest, Ecuador

Anup Shah / Young male Chimpanzee 'Gold' 3-years-3-months-old, watches mother 'Gremlin' use stick as tool to catch termites {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002

Anup Shah / Hamadryas baboons grooming with young chewing stick {Papio hamadryas}

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) juvenile male 'Gimli' aged 10 years using stick to try and get at insects he can hear inside rotting log. Gombe National Park, Tanzania.

Loic Poidevin / Stick Insect (Phasmida) on Silver Ragwort (Jacobaea maritima), Vendee, France. August.

Jack Dykinga / Burrowing owl (Athene cunicularia) fledgling aged one month testing wings in flight whilst playing with stick. Marana, Arizona, USA. May.

Robert Valentic / Goliath Stick Insect (Eurycnema goliath) adult female camouflaged, Cooktown, Far North Qld, Australia. Wet Season.

Robert Valentic / Goliath Stick Insect (Eurycnema goliath) female, walking up grass sward near Cooktown, Queensland, Australia, wet season.

Duncan Murrell / Stick Insect (Calvisia punctulata), female, in Gunung Mulu National Park, Sarawak, Malaysian Borneo.

Duncan Murrell / Stick insect nymphs (Phasmatodea) with empty egg cases on the underside of a leaf in Gunung Mulu National Park, Sarawak, Malaysian Borneo.

Jed Weingarten / Wild Wonders of China / Tibetan macaques (Macaca thibetana) baby with playing with stick, Tangjiahe Nature Reserve, Sichuan Province, Qingchuan county, China

Juan Carlos Munoz / Man leaping over stick in traiditional costume, Carnival of Zamarrones, Pejanda village, Polaciones valley, Cantabria, Spain.

Juan Carlos Munoz / Man leaping over stick in traiditional costume, Carnival of Zamarrones, Pejanda village, Polaciones valley, Cantabria, Spain. February 2013.

Juan Carlos Munoz / Man leaping over stick in traiditional costume, Carnival of Zamarrones, Belmonte village, Polaciones valley, Cantabria, Spain.

Juan Carlos Munoz / The Canarian Shepherd's Leap, a local tradition of walking and leaping across landscape using a pole. Roque Nublo sacred mountain, Tirajana ravine, Gran Canaria Island, The Canary Islands. August...

Piotr Naskrecki / Giant African Stick Mantis (Heterochaeta orientalis) in defensive posture, Gorongosa National Park, Mozambique

Paul Bertner / Wasp (Torymidae) parasitizing Stick Insect (Trachythorax sp)/neggs, Angkor Wat, Cambodia

Paul Bertner / Stick insect, Udzungwa Mountains National Park, Tanzania

Paul Bertner / Stick insect, seen under UV light, Kinabalu National Park, Sabah, Borneo, Malaysia

Paul Bertner / Stick insect, Antananarivo, Madagascar

Paul Bertner / Stick insect, Antananarivo, Madagascar

Paul Bertner / Stick insect, Antananarivo, Madagascar

Paul Bertner / Mossy Stick Insect (Trychopeplus laciniatus), Chiriqui, Panama

Paul Bertner / Mossy Stick Insect (Trychopeplus laciniatus) female, Chiriqui, Panama

Paul Bertner / Mossy Stick Insect (Trychopeplus laciniatus) female camouflaged on moss, Chiriqui, Panama

Juergen Freund / Two Peppermint stick insects (Megacrania batesii) on a twig, one walking out of frame, Wet Tropics World Heritage Area, Cape Tribulation, North Queensland, Australia.

Jack Dykinga / Giant leaves of Devil's Club (Oplopanax horridus) Olympic National Park, Washington, USA, June.

Karine Aigner / African wild dog (lycaon pictus) pups playing with a stick. Malilangwe Wildlife Reserve, Zimbabwe.

Karine Aigner / African wild dog (lycaon pictus) pups playing with a stick. Malilangwe Wildlife Reserve, Zimbabwe.

Karine Aigner / African wild dog (lycaon pictus) pup standing with a stick in it's mouth facing the camera. Mana Pools, Zimbabwe

Staffan Widstrand / Wild Wonders of China / Hill blue flycatcher (Cyornis banyumas) male perched on a bamboo stick in Hong Bung He, Dehong, Yunnan, China

Ashley Cooper / Man using a Go pro camera to video Antarctic Fur Seal pups (Arctocephalus gazella) underwater at Salisbury Plain, South Georgia, Southern Ocean.

Joao Burini / Stick bug (Ceroys sp.). with a mossy camouflage. South-east Atlantic forest, Sao Miguel Arcanjo, Sao Paulo, Brazil.

Oliver Hellowell / Dunnock (Prunella modularis) on mossy stick, England, UK. September.

Graham Eaton / Tilted beds of sandstone and thin shales of the Carboniferous, Culm Measures (Bude Formation) Sandy Mouth near Bude, Cornwall, UK, May. The bed represent cycles of deposition associated with climate c...

Cyril Ruoso / Chimpanzee (Pan troglodytes verus) juvenile male using tool (stick) to extract prey from hole, Bossou, Republic of Guinea.

Francisco Marquez / Man carrying plastic container on a stick, Gate of Asmadin, City of Harar, Ethiopia, February 2008.