The Periyar Tiger Reserve (PTR) has started preparations for conducting the tiger census which will begin in December.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/tiger-census-december
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-thiruvananthapuram
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/periyar-np
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tiger-reserves
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/national-tiger-conservation-authority
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tiger
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/endangered-species
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/census-habitat-monitoring