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.

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

Shattil & Rozinski / Brown bear (Ursus arctos) mother grazing while cub rolls on the ground, Alaska, USA

Mark Moffett / African Scarab Beetle (Circellium bacchus) rolls animal dung into balls which are buried and fed upon by its larvae, South Africa

Pete Oxford / Brazilian Three-banded Armadillo (Tolypeutes tricinctus) rolls into a protective ball when threatened, endemic to Cerrado and Caatinga habitats, Brazil

Mark Payne-Gill / Three banded armadillo rolls up in defensive ball {Tolypeutes tricinctus}

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.

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

Wim van den Heever / Leopard (Panthera pardus) young female rolls in some elephant dung, Greater Kruger National Park, South Africa