Kolkata is green. I was surrounded by trees. You could hear the sun rise through bird calls. As in all Indian cities, the most numerous were the crows. But the greenery just outside the window meant that you could not miss their activity. In this season it was nesting. It seemed that every crow was in search of long thin twigs with which they build their untidy nests. Crows don’t seem to have a sense of which twig they need, and often try to pull fairly thick twigs out of trees.