Tigers, like most big cats of the world, are in retreat. In the past, tigers were found all throughout Asia, from the Caspian Sea to Siberia and Indonesia. Now they occupy only six percent of their former range. In the last decade alone, tiger-occupied area has decreased by 41 percent. Despite decades of conservation initiatives, the number of tigers in the wild is at an all-time low. According to a new study from an international team of researchers, efforts should be concentrated on a few key sites in order to save the species from extinction.