Pug Mark Method: In this method, the foot print of the tiger is important. It is considered that each pug mark is unique in itself & by analyzing various foot prints in the areas of tigers, the number of tigers in that area can be counted.
Camera Trap: In this various method, cameras are installed in the tiger areas having night vision facility as well. By recording various tigers in the camera, the number of tigers can be estimated.
Poop/scat Method: In this method the number of tigers is counted by poop/scat. The poop is analyzed by DNA sampling and then we can arrive at a more accurate count.
Radio Collar Method: Tigers are captured in this method & are fitted with a radio collar. In this way the tigers can be counted.