Loser: Bengal tiger
Wild tigers are in drastic decline, with perhaps 3,000 left. Eventually they'll need scuba gear to live in the mangrove-dominated Sundarbans of Bangladesh. A World Wildlife Fund–led study reports that a predicted 11-inch rise above sea levels from the year 2000 would destroy most tiger habitat in that region.
Better news in Bhutan: As forests move upslope, tigers will likely shift with them, heading deep into northern parklands along major river valleys. Sadly, they would displace or prey on already struggling snow leopards.