Indeed even Ullas Karanth says in his book 'A view from the machan' that man has already infringed the jungle life and made irreversible impact that, now a retreat would mean more harm than good. Of course the point again is debatable. A thorough scientific study can only confirm. Then again a study again means disturbing the natural course of life?

I agree with Sabyasachi that we must not play god.. but we can make sure about their sustainability by protecting their surviving habitats.