Elaphe quatuorlineata is always calm, unless you do something really bad to it. (Or if you name is F....
See
viewtopic.php?f=27&t=2234&p=21756#p21756)
Actually, even if you mistreat it, it just shows (understandable) anger, but still doesn't bite.
In my experience,
V. ursinii is
by no means as placid and calm as Arnold says, at least those in Croatia.
They fight, they strike, they bite like devils... they even jump. But that might as well be the question of
the subspecies (or population) - in Kiskunsag in Hungary I freely handled the
rakosiensis without gloves,
as everyone else did. Even the Hungarian president of the republic, once, by (his own) mistake (or whim)...
(There's a nice movie showing that terrible moment - he was to release the first viper into a newly established
habitat, he was given gloves, but as he had seen the others handling them barehanded, he just removed the
gloves and did the job barehanded - to the utmost terror of all the assembled herpetologists. Noone knows
what his bodyguards & other security felt at the moment, but the staff of the Centre were frozen to death...
All went well.)
I've heard that
Natrix natrix can be prone to biting at night, never by day. (A personal communication by
somebody - I've forgotten whom - who got bitten three times in a single night, but never by day.) Maybe
they just feel more insecure & endangered by night, and therefore get more "nervous" - I don't know, but
I'd very much like to now.
Don't know about
girondica, but
austriaca is certainly not an angry critter - they do bite, but quite "calmly",
and when they decide to do so, they give one a discrete warning in advance about their decision, a really
gentle one, which is fascinating to watch. You know you're going to be bitten within a second, but you are
prepared and you don't take offence... I'll describe it sometimes if noone has before.
(Of course, this observation applies only to handling a
coronella rather gently, not to grabbing it fiercelly or
"torturing" it in any way...)
Regarding
Hierophis gemonensis, it really loves to bite, quite fiercelly, but not forever... Thomas Ott (from
Switzerland) taught me the trick: You catch a gemo with your gloves on, and let it bite them at will, till it
gets enough of it. Then you can safely remove the gloves and handle it barehanded, provided you do it gently
enough, without any sudden and "threatening" movements. It does work, and I taught that to everybody else.
Thanks, Thomas, that makes life much easier, especially at taking photos (without gloves - what a relief!)