Populations of three vulture species of the genus Gyps, the Egyptian Vulture Neophron percnopterus and Red-headed Vulture Sarcogyps calvus have declined markedly on the Indian subcontinent since the mid-1990s and all are now Critically Endangered or Endangered. Gyps vultures have been killed by the widely used non-steroidal anti-inflammatory drug diclofenac, ingested when they feed on carcasses of domesticated ungulates treated with the drug shortly before death. However, it is not known whether Egyptian Vulture and Red-headed Vulture are also sensitive to diclofenac.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/have-population-declines-egyptian-vulture-and-red-headed-vulture-india-slowed-2006
[2] http://admin.indiaenvironmentportal.org.in/category/author/toby-h-galligana
[3] http://admin.indiaenvironmentportal.org.in/category/author/tatsuya-amanoa
[4] http://admin.indiaenvironmentportal.org.in/category/author/vibhu-m-prakash-et-al
[5] http://admin.indiaenvironmentportal.org.in/category/journal/bird-conservation-international
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vulture
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/endangered-species
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drugs
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/egypt
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bandhavgarh-np