List Members,
The narration of Arjuna's trip to the underworld of the NAGAs tells us that the home of the serpents and reptiles is underground.
http://www.holloworbs.com/india.htm
And in the case of the Hill-sized lizard Nriga - during Krishna's time - who was found in a huge sinkhole type of well? A dinosaur, obviously. The lizard had to have come up from an underground stream. The lizard didn't fly in from the clouds only to plop down in a sinkhole well. I think most all reptiles live underground or underwater.
From Merriam Webster's online Dictionary, a definition of sinkhole:
: a hollow in a limestone region that communicates with a cavern or passage
A dinosaur in India during Krishna's times. Hmmm ...
https://www.booksfact.com/puranas/dinosaurs-mentioned-in-bhagavata-purana.html