Endangered Amur tigress with two cubs born in the wild is at risk from poachers.
The marine mammals were washed ashore on an 800 kilometre stretch of the region's Arctic coast.
Amur tigress orphaned in 2012 and released after rehabilitation a year later pictured with her cubs in Bastak Nature Reserve.
Prosecutors and university investigating case after allegations against pair of 'ecologists'.
Environmentalists rescued the male cub after its mother apparently died in unexplained circumstances.
Animal had its snout pushed into the snow as police and wildlife watchdogs search for attackers.
This animal and its lost mother wandered some 700 km too far south 'because they couldn't go north' and got confused.
The bison - or buffalo - are under special protection from hunters amid rising concern over wolf attacks.
Weak and hungry animal saved from dogs as it searched desperately for food.
New Russian national park, aimed at saving endangered big cats has won praise from Prince Michael of Kent.