A female Amur tiger, Iris, licks its 7-week-old cub during one of their first walks in an open-air cage at the Royev Ruchey zoo in Krasnoyarsk, Russia.

A female Amur tiger, Iris, licks its 7-week-old cub during one of their first walks in an open-air cage at the Royev Ruchey zoo in Krasnoyarsk, Russia. The Amur tiger is an endangered species.