This has been happening for thousands of years and at the same time every night they pop out the first run the gauntlet of the birds of prey waiting fir them but it's like a river after only two minutes they flood in their millions for over 45 mins. There is a local market so plenty to eat and wonder around till show time. There us a temple with would you believe Bat like lampposts everywhere . I'd love to go back again but thus time I would get closer to the cave entrance and watch them come out above me,