Martin Willis / Rainbow Lorikeet (Trichoglossus haematodus) pair preening during courtship, Magnetic Island, Queensland, Australia

Winfried Wisniewski / African Lion (Panthera leo) males nuzzling, Masai Mara, Kenya

Juergen & Christine Sohns / Black-footed Penguin (Spheniscus demersus) pair on beach, Betty's Bay, Stony Point Nature Reserve, South Africa

Cyril Ruoso / Long-tailed Macaque (Macaca fascicularis) group, Khao Sam Roi Yot National Park, Thailand

Richard Du Toit / Burchell's Zebra (Equus burchellii) pair nuzzling, Rietvlei Nature Reserve, South Africa

Massimiliano Magnante/ BIA / White Tern (Gygis alba) pair, Bird Island, Seychelles

Anup Shah / African Elephant (Loxodonta africana) calves playing, Masai Mara, Kenya

Hiroya Minakuchi / Japanese Macaque (Macaca fuscata) young in hot spring, Jigokudani, Japan

Chien Lee / Northern Elephant Seal (Mirounga angustirostris) juveniles sleeping, California

Stefan Christmann / Emperor Penguin (Aptenodytes forsteri) pair courting, Queen Maud Land, Antarctica

Stefan Christmann / Emperor Penguin (Aptenodytes forsteri) chicks, Queen Maud Land, Antarctica

Thomas Marent / Bonnet Macaque (Macaca radiata) pair huddling, Western Ghats, India