Mark MacEwen / Japanese macaque (Macaca fuscata) sleeping at hot spring in Jigokudani, Yaenkoen, Nagano, Japan, February.

Karine Aigner / Biologist Clara Cooper-Mullin (left) and her colleague Olivia DaRugna. Clara is holding a Hermit thrush (Catharus guttatus), as part of her study into the migration behaviour of birds that use the isl...

Ashley Cooper / The New Gloucester Service Station on the M5 motorway, UK, is a green roofed building with eco credentials that serves and sells locally sourced food.

Ashley Cooper / The New Gloucester Service Station on the M5 motorway, UK, is a green roofed building with eco credentials that serves and sells locally sourced food.

Tim Laman / Young girl Jessica Laman at rest stop along the river. Taken during the boat trip to Cabang Panti Research Site, Gunung Palung National Park, Borneo. August 2010 Model released.

Tim Laman / Jessica Laman playing on a vine in the flooded forest along the river during a rest stop on a boat trip in Gunung Palung National Park, Borneo. August 2010

Jouan & Rius / Two people with horses (Equus caballus) and a dog, cooking and taking a rest stop from riding, Namib desert, Namibia

George Chan / Camels stop for a rest, one carrying a small child, as a Kazakh family follows ancient migration routes, bringing their possessions and livestock down from the Altai mountains of Xinjiang Province, no...

Doug Perrine / Divers rest at safety stop bar under diving boat, Coral sea, Australia

Michael Quinton / Aerial view of the Copper River Delta mudflats, where each year thousands of shorebirds stop to feed and rest during their spring migration to northern breeding grounds, Alaska

David Fleetham / Whitetip reef shark (Triaenodon obesus) resting on seabed under reef, Hawaii, USA, Pacific Ocean. This species is one of the few reefsharks that can stop swimming and rest.