David Perpinan / Loggerhead sea turtle (Caretta caretta) under rehabilitation getting ready for a radiograph. Rehabilitation centre, Georgia, United States Small repro only

David Fleetham / Young boy getting ready to photograph Galapagos giant tortoise (Geochelone elephantopus). Santa Cruz Island, Galapagos Archipelago, Ecuador. Model released.

Constantinos Petrinos / Chromodorid nudibranch (Glossodoris rufomarginata) pair getting ready to mate, Lembeh Strait, North Sulawesi, Indonesia.

Andy Rouse / Polar bear (Ursus arctos) getting ready to enter water, Svalbard, Norway.

Andy Rouse / Polar bear (Ursus arctos) getting ready to enter water, Svalbard, Norway.

SCOTLAND: The Big Picture / Three people in dive boat, with divers getting ready to go in water, Lamlash Bay, Isle of Arran, South Arran Marine Protected Area, Scotland, UK, August 2016.

Tony Wu / Humpback whale (Megaptera novaeangliae) male on its side, getting ready to slap its pectoral fin on the ocean surface, Vava'u, Tonga, South Pacific

Franco Banfi / Scuba divers getting ready to jump inside the volcanic crack Nesgja, in the Asbyrgi National Park, northern Iceland

Eric Baccega / Nenet woman preparing for spring migration dressing herself and her son in traditional winter boots and coat made with reindeer skin. The temperature is below zero. Yar-Sale district, Yamal, Northwest...

Sebastian Kennerknecht / Pilot, Mark Dedon, getting ready for take-off, Santa Cruz Puma Project, Livermore, California

Jeff Rotman / Commercial fishing boats getting ready to drop net to fish for Sockeye salmon (Oncorhynchus nerka) Naknek River, Bristol Bay, Alaska, USA, July.

Charlie Summers / Arctic grayling (Thymallus arcticus) male and female getting ready to spawn, North Park, Colorado, USA, June.

Lisa Hoffner / Dr. Rono Bernard getting ready to dart an elephant using M99 tranquilizer. Samburu National Reserve, Kenya. Model Released. Taken with cooperation of Kenya Wildlife Service and Save the Elephants

Krista Schlyer / Least tern (Sternula antillarum) parent getting ready to feed Chick with fish, Louisiana, USA. June.

Kirkendall-Spring / Hiker on the Jhomolhari Trek, getting ready to descend to the Soi Yaksa valley, Bhutan, October 2014.

Sergey Gorshkov / Photographer Sergey Gorshkov getting ready to photograph Kamchatka brown bear (Ursus arctos beringianus) underwater, Kamchatka, Far East Russia, August 2006.

David Tipling / Jiawao Sing-sing group from Paiya in Western Highlands getting ready for Paiya Show Western Highlands, Papua New Guinea, August 2011

David Tipling / Jiawao Sing-sing group from Paiya in Western Highlands getting ready for Paiya Show Western Highlands, Papua New Guinea. August 2011

Franco Banfi / Loading the sledges and getting ready to leave for the ice camp, Arctic circle Dive Center, White Sea, Karelia, Northern Russia, April 2010

Yva Momatiuk & John Eastcott / Gentoo Penguin (Pygoscelis papua) getting ready to dive into ocean from iceberg, Gerlache Passage, Antarctica

Roger Powell / Gang-Gang Cockatoos male and female {Callocephalon fimbriatum} getting ready to roost. Victoria, Australia.

Daniel Gomez / Cameraman Mike Pitts getting ready for aerial filming. Brazil.

Shane P. White / Indigenous women getting ready to perform, Paiya Village Mini Show, Western Highlands, Papua New Guinea

Sebastian Kennerknecht / Anti-poaching scouts getting gear ready for deployment, Kafue National Park, Zambia

Sergey Gorshkov / Brown Bear (Ursus arctos) pair near boardwalk with Sergey Gorshkov getting ready to go in the water, Kamchatka, Russia

Kevin Schafer / Amazon River Dolphin (Inia geoffrensis) researchers getting ready to release female, Mamiraua Reserve, Amazon, Brazil

Theo Allofs / Adelie Penguin (Pygoscelis adeliae) getting ready to jump into water, Paulet Island, Antarctica

Tony Wu / Pair of Crowned pufferfish (Canthigaster coronata) getting ready to spawn, with female in foreground and male in rear. East China Sea, Kagoshima Prefecture, Japan.

Andy Rouse / DELETE-BG POOR QUALITY Polar bear (Ursus arctos) getting ready to enter water, Svalbard, Norway.