Trimeresurus, species ID (Southern Thailand)

[Tobias Valentin]

Dear fieldherping people

Can anyone help identifying this Trimeresurus species? It is a juvenile.
I saw it in Southern Thailand, in the Krabi Province (inland hills with rainforest at an elevation of 200 meters).
The snake was on the ground (first photo), then I gently placed it on a branch to get a closer look.

Would be happy if anyone could help.

Regards,
Tobias

[Tobias Valentin]

UPDATE: The snake ID question is solved. An expert in Trimeresurus tells me it is Trimeresurus fucatus.