Help Snake

Today my daughter had the fright of her life. A small snake grey in colour wih a yellow band around the neck and with a black head crawled out from under the couch.  It was only about 4" long so not so big, but I have tried searching  to find out if it is poisonous or not, can anyone help. The house is in Cantabria near reinosa if that is of any help.
Thanks
Andy

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Venomous snakes in Spain

There are a total of 13 snakes present in Spain of which five are venomous. These are:

Seoane's viper (Vipera seoanei - víbora de Seoane)
Asp viper (Vipera aspis - víbora áspid)
Snub-nosed or Lataste's viper (Viborade lataste - vibora hocicuda)
False smooth snake (Macroprotodon cucullatus - culebra de cogulla)
Montpellier Snake (Malpolon monspessulanus - culebra bastarda or de Montpellier)

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OMG!
How scary is that!
Hope they can't climb, I live on the 3rd floor.............
Country walks in Spain may be out for me now!
I hate snakes!!!!!!

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I actually saw what appeared to be a Montpellier about two and a half years ago. Was driving along a quiet residential street when across the road in front of me was a snake of about 1.5 metres to 2 metres long - it slithered off and I saw it in the rear view mirror - stopped the car and got out intrigued to see its back end disappear into some shrubbery - had come out of an empty overgrown plot of land where i guess it lived - built up area about 5 minutes walk to the beach in Marbella. Didnt really occur whether it was venomous or not but was far enough away to know I could get b ack in the car if it took a more aggressive stance but generally these things leave you alone if you leave them alone - hence i didnt go diving into the shrubbery in hot pursuit - too small to be a decent meal for a crocodile anyway.

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