I just went to the bathroom.   I lifted the seat and revealed this.  My partner says it's a green snake - venomous but not deadly.  Can anyone improve on that?  In case it's relevant, I live in Roi Et province, in the northeast.

When the family came to look at it, it disappeared behind the toilet.  When we looked there (with a phone camera), there are gaps under the floor where the waste pipe goes where it could have entered.  A builder is being sought to block these.

 

I try not to think about the scenerio where I didn't need to lift the seat...  😀

 

It's a snake🤔

 

Non venomus rat snake. 

Gonyosoma oxycephalum

 

 

Golden tree snake by the looks of it. Not sure colour quality isn't that good. Beautiful snakes.

Chrysopelea ornata

Yeah, I thought he was a Golden too, mildly venomous but rear-fanged so of no danger unless you are a rat etc.

 

5 minutes ago, IvorBiggun2 said:

Non venomus rat snake. 

Gonyosoma oxycephalum

 

 

 

 

Could be it's difficult to see. Colour saturation isn't good in the OP's snap and there is no clear view of either head or tail. If it's a Gonyosoma oxycephalum it should have a red tail hence the name red tailed green rat snake. 

Recent model American Standard.

The "Snakes of Isaan" Facebore group think he's a Golden.

 

I cannot resist - a toilet snake?

Green Tree snake ....  venomous but not life threatening. 

 

 

but where's your toilet brush  ?

Guessing you must live in a house in Roi Et & not on a high floor in a condo. 

That's a relief. 

8 hours ago, garygooner said:

Guessing you must live in a house in Roi Et & not on a high floor in a condo. 

That's a relief. 

No, not a condo.

Update:

It still resides somewhere behind the toilet and makes an occasional appearance (see below) but we've bought a snake net and hope to ensnare it soon...