Bengal tigers could vanish from one of their final strongholds

A Bengal tiger in the Sundarbans, which crosses India and Bangladesh.

(CNN)Feared and revered, it's one of the world's most iconic creatures: the majestic Bengal tiger.

Already threatened by poaching and humans spreading into its shrinking habitats, researchers say that in just 50 years it could completely disappear from one of its last remaining strongholds -- a huge mangrove forest called the Sundarbans, which crosses India and Bangladesh.
    Over the past century, we've lost 95% of all the world's tigers, leaving less than 4,000 in the wild. Bengal tigers are found in a handful of Asian countries, but just a few hundred still roam free in the Sundarbans.
      Covering more than 10,000 square kilometers, the low-lying area is shrinking rapidly, with some of its islands submerging as local sea levels rise much faster than the global average.
      Between 2004 and 2015, the number of Bengal tigers fell from 440 to 106 in the Bangladesh Sundarbans. That number is "dangerously low" said Dipankar Ghose, director of the species and landscapes program at the World Wildlife Fund (WWF), due to "an escalating poaching crisis, habitat degradation and fragmentation."

      Rising seas and less fresh water