The white tree frog, which is native to Australia, Indonesia and New Guinea, "sunbathes" on a branch in Indonesia. /CFP

An inquisitive emu looks into a photographer's camera at Maru Koala and Animal Park, near Melbourne, Australia. /CFP

One-year-old giant panda cub Nuan Nuan reacts inside her enclosure during a birthday celebration in 2016 at the National Zoo in Kuala Lumpur, Malaysia. /CFP

A Siberian tiger "smiles" at visitors at the Hangzhou Zoo in east China's Zhejiang Province. /CFP

This gray seal pup nibbles on its flipper as it playfully stretches out after snoozing in the winter sun on the Lincolnshire coast in UK. /CFP