Mothra! 25 cm wingspan when relaxed.
This monster was sitting on the road on my soi. It's still alive but probably dying as it doesn't fly away, just flaps it's wings weakly.
It looks like a larger version of the moths that lay eggs in mangoes in Fiji. Ruin a whole tree full of fruit. There's a mango tree and a fruiting sakon tree above where I found it, so I wonder if it's the same sort of pest.
https://teakdoor.com/Gallery/albums/u...352/Mothra.jpg