Do you know #Vultures are obligatory scavengers, so they never hunt. They feed on the dead bodies only. Also they can digest anything from diseased to old bodies, very efficient scavengers. Means clean environment very efficiently. Today is international vultures awareness day.
That is why called as #ecosystem doctors.

But many species of vultures are now critically endangered. Some reduced by 99% in the wild.
And one drug killed them in such a huge number is Diclofenac.
Diclofenac is administered to cattle - eating of dead cattle by the vultures.
Vultures die of kidney failure (I am explaining in way simple manner) within some time. This took a decade of research by people like Dr Vibhu Prakash to find out the exact reason behind their mortality.
You see how one thing has a direct and life threatening impact on other species !! By the time we knew the cause it was already too late.
Cattle grade diclofenac was banned and an alternative was proposed called as Meloxicam. But still diclofenac is used in many parts of India, which is a matter of worry.