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.

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

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...

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

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

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

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

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...

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.

Emanuele Biggi / Leaf insect (Phyllium sp.) camouflaged in rainforest, Mulu National Park, Borneo (Malaysia)