It is a tiny piece of heaven on the Odisha coast. The Bhitarkanika Wildlife Sanctuary is where the world's largest living reptile, the estuarine crocodile, is thriving amidst sylvan surroundings after having been brought back from the brink. But now there is trouble with the reptile population booming, posing a threat to the natural balance.

From a strength of 96 crocodiles in 1976, the population now stands at 1,646. A boat ride in some areas can yield crocodile sightings as frequent as one croc a minute, according to a conservationist.