Well, I´ve seen a few stray ones when camping on Tha yang River. They hover near the mangroves.Others have spotted the rare one or two at the Pasir Ris Mangrove Boardwalk.If you are in Chumphon, you might also see some at the Insect Kingdom.

But all these are no match for the thousands upon thousands you will see on a Chumphon Fireflies Tour. And I can tell you it´s worth the hassle of that 1-hour drive from Chumphon.