At 5am in the mangrove jungle of the Sunderbans National Park in West Bengal, the inhabitants, human and animal, have already been up for several hours. Nothing is yet visible through the cool mist.

By 6am the mist is lifting and fishermen are finishing their all-night vigils in small wooden boats. They have spent the night with small oil lamps to attract fish, and with that catch safely stowed in the bottom of their boats, they are fishing in the shallows for crabs.