Hello Ilian! I say it's fighting :-) 

Hi Ilian,

Yes, it is probably male to male combat.

But do not forget the legal matters when you use such photos from the internet. I guess they are protected by copyright which means that you must first have the photographer's permission to use them. Otherwise we can just link to photos without asking.

Kind regards,
Henrik Bringsøe 

Thanks guys! I think it's a combat,too!

Henrik, I found the photos accidently and there was no name of author or anything..it wasn't in a herp related website! I wish someone interested in reptiles had the luck to observe that fight!