There are only 3200 wild tigers left in the world:

The world has been trying to save tigers since the 1970s, when it was discovered that populations had shrunk precipitously, and in some places vanished, throughout Asia, home to all the wild tigers left on earth. But conservation has largely failed. Drastic loss of habitat, halfhearted efforts by the governments of many of the 13 tiger-range countries, uncoordinated objectives of competing NGOs, and, above all else, an unstanchable and illegal market for tiger parts in China have reduced the number of wild tigers to 3,200—at a high estimate. “Existing habitat right now could accommodate 20,000 tigers,” Alan says. “That’s a far cry from the 100,000 that roamed a hundred years ago, but I’d be happy if we got to 10,000 in large, stable, interconnected landscapes.”

In the Indian Sundarbans, a recent census posits around 103 tigers—these days a significant population. Estimates for the Bangladesh side run upwards of 400 but are based on shaky data. If the real number is even a fourth of this, the combined Indian-Bangladeshi Sundarbans tiger population would be one of the most robust left on earth.