Tiger (Panthera tigris) populations, on average, have declined 70 per cent across the world, including Bangladesh, in the last 30 years, according to the Living Planet Report 2012.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/world%E2%80%99s-tiger-populations-declined-70pc-30-yrs
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/new-age-bangladesh
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tiger
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bangladesh
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-asia
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/endangered-species
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/poaching
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wwf
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/population
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dhaka
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sundarbans