By boa, are you referring to pythons? If they are pythons, are they the light brown, dark brown, with black markings (Burmese Pythons/Dunkler Tigerpython), as opposed to the pythons with grey, black, yellow and white markings (Reticulated Python/Netzpython)? I am within a week of a submission deadline for geographical distribution and natural history notes on Burmese Pythons in Thailand, so locations in Thailand are very important for this species. The only location published for Loei is Phu Luang.

This is
Python molurus bivittatus (Burmese Python)

This is
Python (
Broghammerus)
reticulatus (Reticulated Python)
Both should be found in our area. At 6m,
Python (
Broghammerus)
reticulatus is capable of swallowing people, but I do not know of any attacks on humans in Thailand and the largest wild one I have come across was only 387cm.