Ole Jorgen Liodden / Arctic tern (Sterna paradisaea) attacking an Arctic Fox (Vulpes / Alopex lagopus) protecting its nest site, Spitsbergen, Svalbard, Norway. Highly commended, MAMMALS, GDT 2011 competition

Ross Hoddinott / Female chalkhill blue butterfly (Lysandra coridon) with wings closed resting on Devils-bit scabious (Succisa pratensis), Hatch Hill, Somerset, UK. August 2016.

Ingo Arndt / Red-eyed tree frog (Agalychnis callidryas) eye closed with semi-transparent eyelid that allows it to see its surroundings even while resting, Costa Rica.

Ingo Arndt / Christmas Island Red Crabs (Gecarcoidea natalis) crossing closed road, during annual migration, Christmas Island, Indian Ocean, Australian Territory, November 2009.

Peter Schwarz/ BIA / Oldworld Swallowtail (Papilio machaon) butterfly, Hesse, Germany

Peter Schwarz/ BIA / Glandon Blue (Agriades glandon) butterfly, Valais, Switzerland

Alex Mustard / Maldivian anemonefish (Amphiprion nigripes) shelters against a closed magnificent sea anemone (Heteractis magnifica). Male Atoll, Maldives. Indian Ocean.

Andy Rouse / African Lion (Panthera leo) female carrying young cub. Masai Mara, Kenya, Africa. August.

Edwin Giesbers / Western lowland gorilla (Gorilla gorilla gorilla) twin babies age 45 days resting on mother's chest, one suckling. captive, occurs in Central Africa. Critically endangered.

Yukihiro Fukuda / Japanese macaque (Macaca fuscata fuscata) rare white furred baby playing with another baby. Jigokudani Valley, Nagano Prefecture, Japan. June.

Staffan Widstrand / Wild Wonders of China / Crested myna starlings (Arcidotheres cristatellus) sitting on domestic waterbuffaloes (Bubalus domesticus), Poyang Ho Lake, Jiangxi province, China

Espen Bergersen / Atlantic puffins (Fratercula arctica) group interacting, Hornoya bird cliff, Finnmark, Norway. March.