Expressindia / January 9 2006 // DEHRA DUN : In order to conduct a scientific survey of the tiger population this year, Wildlife Institute of India (WII) would soon be issuing photo identity cards to all the tigers of the country. WII scientists have also proposed three new scientific techniques to have a more accurate count of the tigers living in the wild. As per the proposal, the three techniques are namely — computerised pugmarks, camera traps and DNA tests. All the three techniques would be used in the tiger survey starting in the country from January 15. Earlier, forest and wildlife officials had been using physical count as well as pugmark verification to find out the number of the tigers in the wild. However, this technique was not considered reliable.