This has been attributed to extensive logging, forest fires and fragmentation of the vital ecosystem for farming.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/two-bird-species-risk-extinction
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/standard-media-kenya
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/birds
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/endangered-species
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kenya
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forests
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/africa