Andrew Parkinson / Bengal tiger (Panthera tigris tigris) head portrait of a 19-month sub-adult relaxing in dappled light. Bandhavgarh National Park, Madhya Pradesh, India.

Jouan & Rius / Eastern grey kangaroo (Macropus giganteus) resting on beach, Queensland, Australia

Steven Kazlowski / Weddell seal (Leptonychotes weddellii) relaxing on a rocky beach on the western Antarctic Peninsula, Antarctica, Southern Ocean

Yva Momatiuk & John Eastcott / Grizzly Bear (Ursus arctos horribilis) 4 month old cubs trying to engage mother in play, Katmai National Park, Alaska

ZSSD / African Lion (Panthera leo), African Lioness resting on log, native to Africa

Pete Cairns / Woman lying barefoot in field of daisies, enjoying nature on a summer day, Cairngorms National Park, Scotland, UK. Soles of feet visible Model released.

Anup Shah / Eastern common chimpanzee {Pan troglodytes schweinfurtheii} lying on ground, Mahale NP, Tanzania

TOM MANGELSEN / Polar bears relaxing, Hudson Bay Canada

Mark Raycroft / Golden Retriever (Canis familiaris) relaxing on lawn with a young girl

Michio Hoshino / Polar Bear (Ursus maritimus) profile, Churchill, Manitoba, Canada

Michio Hoshino / Polar Bear (Ursus maritimus) laying on ice on belly to cool off, Churchill, Manitoba, Canada

Heidi & Hans-Juergen Koch / American Alligator (Alligator mississippiensis) three large adults laying in shallow water, Florida