There is some good news ahead of the international Tiger Summit that starts Sunday in Russia, where global leaders will seek to double the number of tigers in the wild by 2022.
The 13 Asian countries where tigers roam in the wild have already agreed in principle to that ambitious goal.
A study this year suggested that protection measures are effective in bringing tigers back.
Over the past 50 years, protection efforts have helped the endangered Amur tiger bounce back in Russia’s Far East. The population was boosted to 430-500 today, making it possible for the tigers to migrate into forests of neighboring China.