I have no idea how people go about saving animals, especially ferocious ones like tigers. But, I do know no animal should be forced to extinction just because of our greed.
Though personally, I dislike cats , I revere the big ones ... especially pumas, tigers and cheetahs ... Their agility and speed. And I do like tigers ... very much, in fact ! I like the expressions on their faces - a melting look at one moment , and a look of pure anger the very next moment. If looks were an indication of character, tigers would be the most genuine living beings. Nothing done by half .... Affection and anger in full measures. And they are wonderful swimmers !
But, in most stories, tigers are depicted as villainous. Especially in the case of "The Jungle Book".
I feel bad that these animals are dying. I don't know if there is something that can be done from my side ... but if there is , I'd like to do it.