India, June 23 -- What are some surprising facts about the wild flora and fauna in Delhi?

Delhi's oldest fort, Lal Kot is in Sanjay Van, which is part of the Delhi Ridge Forest. I climbed the fort one night and found a six-spotted ground beetle there. It's very big and squirts acid if you get too close. I found it fascinating that the oldest fort in Delhi is now colonized by beetles; the beetles were actually there way before forts were ever made. So, in a sense, there are some old places in Delhi which are the same as they were thousands of years ago.

There are places that still have native wildlife, native vegetation. Mangar Bani, just at the outskirts of Delhi, is another such place. There are places in the Central Ridge which have v...