01690 720214

Adder or Viper - Vipera Berus

Ange Boyson (July)

We saw this Adder just on the forest track by Plas y Brenin.

Also known as 'Vipers' Adders are active during the day, spending time basking in the sun until their body temperature is high enough to hunt for food. This is probably what this Adder was doing when we disturbed it.

The Adder is recognisable by the bold zigzag stripe down its back and a distinctive inverted V shape on the back of the head.

They are BritainâÂ.Â.s only venomous reptile but are not aggressive snakes and will only attack if harassed or threatened. Although an AdderâÂ.Â.s bite is not lethal, the bite is very painful and requires urgent medical attention. There have only been 10 recorded deaths from their bite in the last 100 years. With proper treatment, the worst effects are nausea and drowsiness, followed by severe swelling and bruising in the area of the bite. It's worth noting that most people who are bitten by an adder were handling the snake at the time. So it's best to treat adders with respect and leave them alone.

Got A Date Available - Need An Adventure To Match?

Find out what's going on at the National Mountain Sports Centre between any date range on this handy new search page

Latest News


Environment Symposium For Mountain LeadersThe 2017 Plas y Brenin Environment Symposium for Mountain Leaders and Mountaineering Instructors wil....


New Autumn Fast Track Instructor Scheme Option AddedWe've added another option to our Fast Track Instructor Scheme. Until now, the course has always run....


Fast Track Instructor Scheme<br/>Open DaysJoin us for a free information day on May 1st and find out how the Fast Track Instructor Scheme can ....


New Mountain Bike Courses LaunchedCheck out our new range of mountain bike courses designed to help you improve your skills fast.....


Equipment HireOur equipment stores is packed with carefully chosen, well maintained technical gear. Provided we ....

What's On In Our bar?

Our friendly and lively bar is open to the public. From talks and lectures to film nights and live music, there's always something going on. Find out what's coming up next here

Adventure Sport
Summer Camps (Age 12-17)

Summmer Camps For Young People Aged 12-17Young climbers, mountaineers, paddlers and mtb riders aged 12-17. Develop your outdoor skills with our top coaches on one of our residential summer camps.

Enhanced Learning Credits

Enhanced Learning CreditsThe Enhanced Learning Credit Administration Service offers funding for armed forces personnel. Plas y Brenin is able to accept ELCAS funding for a few specific non residential courses.

Weather Forecast, Tides and Surf Conditions

Find out what the weather's doing in North Wales over the next five days.

Review your holiday or course here

Review Your Course
Help us by reviewing your holiday or course here

Adventure Map

Working alongside UCLan
to educate
outdoor professionals

University Of Central LancashireFind out how we are working with one of the country's top universities to develop lasting careers in the outdoors.