Nilgai, in India, comes under Schedule III of the Wildlife Protection Act, 1972.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/bihar-intended-cull-nilgai-and-wild-boar-vermin-five-years-rti
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bihar
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife-act-1972
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/right-information-rti
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/crops