To find the most up-to-date information on the number of tigers in India in 2013, I recommend checking official sources like:
* The Wildlife Institute of India (WII): They are a leading organization in wildlife research and conservation in India.
* The Ministry of Environment, Forest and Climate Change (MoEFCC): They are the government body responsible for wildlife conservation in India.
* The World Wildlife Fund (WWF): A global conservation organization with a strong presence in India.
These sources will provide you with the most accurate and reliable information on the tiger population in India for that specific year.