Proposed large scale plantation of toxic Jatropha will be curse for
bird species. The large scale plantation will force the bird species
to sit on toxic Jatropha plant. In many parts of India Jatropha plant
parts are used to kill the birds. It indicates that birds are also
susceptible to Jatropha poisoning. In general monoculture of any
plant leads to harmful consequences for avian species. You are well
aware members about the role of birds in any ecosystem. Unfortunately
the Jatropha promoters have never kept this important point in their
mind. It shows their carelessness and greediness to earn by any mean
s.

I have collected over 100 scientific references on Birds and Jatropha
toxicity. One most commonly used reference is here

http://www.petpublishing.com/birdtimes/articles/badplant.shtml