In the ruthless skies of Delhi, the hunter is often the hunted. Abundant black kites which are seen flying thick and fast in the skies drop to the ground, slashed by kite strings. Many die but some are fortunate to land upon the lab tables of Wildlife Rescue, a bird clinic run by brothers Nadeem Shehzad and Mohammad Saud in Wazirabad where 20,000 raptors have regained vigour and flight after treatment over the last 20 years.