A year and a half ago Alexander Milezhik realised the need for a new system of caring for injured birds.
Aged 71, she shuns civilisation and accepts a helicopter ride back to her home in remote Siberia, without a gun to protect her from bears.
Plans to remove barbed wire from migration route would allow safe passage and help boost numbers of tigers and leopards.
The Amur cubs were specially trained to cope after being raised in Zhelundinsky Nature Reserve.
More than 20 calves born although park keepers say there could be more.
Endangered Amur tigers are protected under President Vladimir Putin's special project.
A couple cowered in their banya - sauna - watching the hungry creature eat their dinner.
Renowned scientist says temperatures could 'rise twice faster' in Yakutia than the rest of the world.