In 1997 in the far reaches of Siberia, an injured tiger killed two men and stalked several others. It started when a poacher named Vladimir Markov shot the tiger and stole a kill the tiger had made.

In a recent phone interview from his home in Vancouver, Vaillant, 50, said he discovered the story of Markov, Trush and the endangered Amur tigers through “Conflict Tiger,” a documentary by British ...

EDITOR’S NOTE: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...