Links:
[1] http://admin.indiaenvironmentportal.org.in/news/birds-galore-kolleru
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kolleru-sa
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/birds
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/census-habitat-monitoring
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/andhra-pradesh