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Are Scottish Adders Poisonous?

Published in Scottish Wildlife 2 mins read

Yes, Scottish adders are indeed venomous. They are, in fact, Britain's only native venomous snake. While often colloquially referred to as "poisonous," the correct term is venomous because they inject their toxic substance through a bite, rather than it being harmful if ingested or absorbed through the skin.

Understanding Adder Venom

The adder's venom is primarily designed to immobilize its prey, but it can certainly affect humans. While an adder bite can be a distressing experience, it is generally considered to be of little danger to healthy adults.

Here's what to understand about adder bites:

  • Painful but rarely fatal: An adder bite typically causes immediate, intense pain and can lead to a nasty inflammation around the bite area. Swelling, bruising, and tenderness are common.
  • Systemic effects: In some cases, more widespread symptoms may develop, such as nausea, vomiting, dizziness, or a rapid pulse, though these are less common and usually not severe.

Who is Most at Risk?

Despite common stories of severe danger, the venom of a Scottish adder is only truly dangerous to specific vulnerable groups.

Risk Factor Description
The Very Young Due to their smaller body mass and developing immune systems, children are more susceptible to the effects of venom.
The Elderly Older individuals, especially those with pre-existing health conditions, may have a diminished ability to cope with the physiological stress and effects of the venom.
The Ill Individuals with underlying health conditions, such as heart problems, respiratory issues, or compromised immune systems, are at a higher risk of experiencing more severe reactions or complications from an adder bite.
Allergies Although rare, an individual can have an allergic reaction to adder venom, which could lead to anaphylaxis – a severe, life-threatening allergic reaction requiring immediate medical attention.

Where to Find Adders

Adders (Vipera berus) are reclusive creatures, typically found in areas like heaths, moorlands, and woodlands. They are often spotted basking in sunny spots to regulate their body temperature. They are not aggressive and will usually try to escape if disturbed. Bites typically occur when an adder is accidentally stepped on or handled.

For more information on adders and their habitat in Scotland, you can visit the Scottish Wildlife Trust.