Adrian Davies / Cape Sundew (Drosera capensis) with captured fly. Note how leaf has rolled over the prey.

Staffan Widstrand,Staffan Widstrand / Mangrove planting team from CRINEO planting Rhzophora mangrove trees, Pulicat Lake, Tamil Nadu, India, February 2013.

Staffan Widstrand / Mangrove planting team from CRINEO planting Mangrove trees (Rhizophora) Pulicat Lake, Tamil Nadu, India, February 2013.

Mark Bowler / Three-banded Armadillo (Tolypeutes tricinctus) rolled up in defensive posture. Captive. Endemic to Brazil.

Pete Oxford / Boy sitting on rolls of Balata made from latex collected from Balata / Bullet Wood tree, Nappi, Rupununi, Guyana, used for crafts, February 2010

Petra Wegner / Cavalier King Charles Spaniel, puppy, blenheim coated, aged 10 weeks, curled up on human feet. Model released

Mark Taylor / Two young Hedgehogs (Erinaceus europaeus) one standing, one rolled into a ball.

Bryan and Cherry Alexander / Recently rolled iceberg showing ridges formed beneath surface. Northwest Greenland, 1991.

Doug Perrine / Salmon shark {Lamna ditropis} captive, with salmon in mouth (eyes are rolled back for protection), Prince William Sound, Alaska, USA, (digitally modified)

Mark Payne-Gill / Brazilian three banded armadillos rolled up in defensive ball {Tolypeutes tricinctus} - head and back view. Articulated tough skin in hinged bands allow flexibility

Pete Oxford / Temminck's ground pangolin {Manis temmincki} rolled in defensive ball Africa

Jurgen Freund / Cairns birdwing butterfly (Ornithoptera euphorion) female, close-up with proboscis rolled up. Queensland, Australia.

Jeff Vanuga / Ice smoothed by the action of sea water reflecting the sky . This iceberg had rolled minutes earlier. Svalbard archipelago, Norway. June

Terry Whittaker / Red fox (Vulpes vulpes) stalking a Hedgehog (Erinaceus europaeus) in an urban garden at night, hedgehog rolled in defensive posture, Greater Manchester, England, UK, November.

Terry Whittaker / Red fox (Vulpes vulpes) feeding in an urban garden at night, with a Hedgehog (Erinaceus europaeus) rolled up in defense nearby, Greater Manchester, England, UK, November.

Terry Whittaker / Red fox (Vulpes vulpes) trying to pry open a rolled up Hedgehog (Erinaceus europaeus) in an urban garden at night, Greater Manchester, England, UK, November.

Klein & Hubert / Young Common hedgehog (Erinaceus europaeus) partly rolled up in a ball in dead leaves, in autumn, France. Controlled conditions.

Klein & Hubert / Adult Common hedgehog (Erinaceus europaeus) rolled up into an ball in dead leaves in autumn, France. Controlled conditions.

Klein & Hubert / Common hedgehog (Erinaceus europaeus) partly rolled up into a ball in dead leaves in autumn, France. Controlled conditions.

Xiao Shibai / Wild Wonders of China / Confiscated Chinese pangolin (Manis pentadactyla) rolled in a ball. Shenzhen Wildlife Rescue Center, Guangdong, China. Captive, digitally cleaned.

Jo-Anne McArthur / We Animals / Pile of rolled rattlesnake skins and rattles, annual Rattlesnake Roundup, Sweetwater, Texas, USA.

Terry Whittaker / Red fox (Vulpes vulpes) feeding in an urban garden, with a Hedgehog (Erinaceus europaeus) rolled up defensively nearby, Greater Manchester, UK, August. Filmed using a camera trap.

Aflo / Dung Beetle, (Scarabaeus sacer), adult pair rolling elephant dung for egg deposition, Isimangaliso Wetland Park, Kwazulu Natal, South Africa, Africa

Aflo / Dung Beetle, (Scarabaeus sacer), adult rolling elephant dung for egg deposition, Isimangaliso Wetland Park, Kwazulu Natal, South Africa, Africa

Tony Wu / Humpback whale female calf (Megaptera novaeangliae australis) slapping the ocean surface with her fluke and rolled over on her back, Tonga.

Andy Sands / Brown rollrim fungus (Paxillus involutus) common fungi with a distinctive rolled edge to the rim of the cap, Buckinghamshire, England, UK, December. Focus stacked image

Adrian Davies / Pill millipede (Glomeridae), rolled into defensive ball. Danum Valley, Sabah, Borneo

Jeff Rotman / Rolled marijuana / cannabis joints, in cannabis dispensary, Denver, Colorado, USA, June 2015. Marijuana has legalized in the state of Colorado, and this farm produces Marijuana for medical and retail...

Jeff Rotman / Rolled marijuana / cannabis joints, in cannabis dispensary, Denver, Colorado, USA, June 2015. Marijuana has legalized in the state of Colorado, and this farm produces Marijuana for medical and retail...

Chris Mattison / Comb-footed spider (Enoplognatha ovata) female guarding egg-sac in rolled-over oak leaf, South Yorkshire, England, UK, December. September. Focus-stacked image

Wim van den Heever / Humpback Whale (Megaptera novaeangliae) rolled onto back with fin out of water during annual sardine run, Port St Johns, South Africa. June.

Wim van den Heever / Humpback Whale (Megaptera novaeangliae) rolled onto back with fins out of water during annual sardine run, Port St Johns, South Africa. June.

MYN / Tim Hunt / Hedgehog (Erinaceus europaeus) rolled into ball, Barnt Green, Worcestershire, England, UK, May.

Andy Sands / Sexton / Burying Beetle (Nicrophorus vespilloides) rolled onto back showing the Phoretic mites it is carrying, Hertfordshire, England, UK. September

Alex Hyde / Sequence of Pill millipede (Glomeridae) unrolling from a defensive position, Danum Valley, Sabah, Borneo. Digital composite.

Alex Hyde / Pill millipede (Glomeridae) rolled into a defensive ball. Danum Valley, Sabah, Borneo.

Alex Hyde / Pill millipedes (Glomeridae) rolled up in defensive position, Danum Valley, Sabah, Borneo.

Enrique Lopez-Tapia / Madagascar green-emerald giant pill millipede (Zoosphaerium neptunus) Andasibe-Mantadia National Park. Madagascar.

Solvin Zankl / Leaf roller weevil (Byctiscus betulae) on rolled leaf, Niedersachsische Elbtalaue Biosphere Reserve, Lower Saxonian Elbe Valley, Germany, June.

Solvin Zankl / Hazel Leaf-roller Weevils (Apoderus coryli) mating above her rolled hazel leaf, Westensee, Germany, May. Captive.

Solvin Zankl / Hazel Leaf-roller Weevil (Apoderus coryli) two males competing to mate with female on her rolled leaf, Westensee, Germany, May. Captive.

Luiz Claudio Marigo / Southern three banded armadillo (Tolypeutes matacus) rolled up in defensive postition near destroyed termite mound, Cerrado region of Piaui State, Northeastern Brazil.

Ingo Arndt / Roller Weevil (Attelabidae) rolled leaf with larva inside, Arfak Mountains, West Papua, Indonesia.

Ingo Arndt / Roller Weevil (Attelabidae) rolled leaf with larva inside, Arfak Mountains, West Papua, Indonesia.

Konrad Wothe / Rolled tail of a Parson's Chamaeleon (Calumma parsonii) male, Perinet, Andasibe Mantadia National Park, Madagascar

Adrian Davies / Cape Sundew (Drosera capensis) with captured fly. Note how leaf has rolled over the prey.

Gavin Hellier / Newly dyed fabric being washed and rolled in a sari garment factory, Rajasthan, India, UK

Jurgen Freund / Pill bug (Armadillidium sp) rolled into ball, on forest floor, Tanjung Puting National Park, Borneo, Central Kalimantan, Indonesia