Portside

Bengal tigers can be elusive. They're classified as an endangered species, they're mostly nocturnal, and if they had their way, they wouldn't see many humans, either. Native to Southeast Asia, there are only an estimated 1,850 left in the wild. That makes counting them somewhat difficult—but researchers in Nepal have developed a system that they think will make it easier to figure out how many tigers live there. It works for other species as well.