The BNHS first documented the sharp decline in vulture populations across the Indian subcontinent in 1999, and subsequent research established that diclofenac, a veterinary non-steroidal anti-inflammatory drug (NSAID), was responsible for mass mortality among the birds

All the vultures were fitted with GSM and satellite tags on December 19 in 2025, to enable scientists to track their movement, and survival after release into the wild