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Providing evidence to improve practice

Individual study: The effectiveness of supplementary feeding in reducing mortality through diclofenac exposure in oriental white-backed vultures Gyps bengalensis at Toawala, Punjab province, Pakistan

Published source details

Gilbert M., Watson R.T., Ahmed S., Asim M. & Johnson J.A. (2007) Vulture restaurants and their role in reducing diclofenac exposure in Asian vultures. Bird Conservation International, 17, 63-77


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Provide food for vultures to reduce mortality from diclofenac Bird Conservation

A before-and-after trial in 2003-4 (Gilbert et al. 2007) found that daily mortality of oriental white-backed vultures Gyps bengalensis at a colony in Punjab province, Pakistan, was significantly lower during two periods when supplementary food (diclofenac-free donkey carcasses) was provided at a nearby ‘vulture restaurant’, compared to two control periods (0.072 birds/day dying over 111 days when food was provided vs. 0.387 birds/day over 116 days without food). Of the 30 dead vultures examined (eight from supplemented periods), 29 showed signs of diclofenac poisoning. Home range size of three radio-tagged vultures appeared to contract when they discovered the ‘restaurant’ (thus reducing the possibility of contact with diclofenac) but two further tagged vultures did not use the restaurant at all.