The United Kingdom is home to only two native snake species: the adder (Vipera berus) and the smooth snake (Coronella austriaca). Despite their limited numbers, these snakes play an important role in the UK’s ecosystems and are a subject of interest for many nature enthusiasts and conservationists.
Background: Snakes in the UK
Unlike many other countries, the UK has a very limited variety of native snakes. Historically, the climate and geographical factors have restricted the diversity of snake species that can survive here. The two native species, the adder and the smooth snake, are both non-venomous or mildly venomous and are protected by law due to their declining populations.
The Native UK Snakes
Adder (Vipera berus)
- Distribution: Widely found across England, Scotland, Wales, and parts of Northern Ireland.
- Appearance: Recognizable by its distinctive zigzag pattern along the back, with coloration ranging from grey to brown and black.
- Behavior: Generally shy and non-aggressive, they prefer to avoid humans and are mostly active during warmer months.
- Venom: Venomous but rarely dangerous to humans; bites are uncommon and usually only cause mild symptoms.
Smooth Snake (Coronella austriaca)
- Distribution: Limited to specific areas such as southern England, particularly in heathlands and chalk downs.
- Appearance: Small, slender, with smooth scales and a coloration that varies from grey to brown, often with darker markings.
- Behavior: Secretive and prefers dry, sunny habitats; active during spring and summer.
- Venom: Non-venomous and harmless to humans.
Non-Native and Introduced Snakes
Besides the native species, the UK occasionally encounters non-native snakes, primarily as a result of the pet trade or accidental introductions. These include species like the grass snake (Natrix helvetica), which is often mistaken for native snakes but is actually a different species that has expanded its range into parts of southern England.
Are There Other Snake-Like Reptiles in the UK?
While the UK has only two native snake species, it is home to other reptiles such as lizards, including the common lizard and sand lizard, but no other snake-like reptiles besides the two native species. The slow-worm (Anguis fragilis), often mistaken for a snake due to its elongated body, is actually a legless lizard, not a snake.
Conservation and Protection Status
The adder and the smooth snake are both protected under UK law, specifically under the Wildlife and Countryside Act 1981. Their populations have declined due to habitat loss, persecution, and other environmental pressures. Conservation efforts focus on habitat preservation, legal protection, and public education to prevent unnecessary killing or disturbance.
Comparison of Snake Species in the UK
- Adder vs. Smooth Snake: The adder is more widespread and larger, with distinctive markings, whereas the smooth snake is rarer, smaller, and more elusive.
- Native vs. Non-native: Native species are well-adapted to UK habitats, while non-native species are often introduced and may pose ecological concerns.
Frequently Asked Questions
How many native snake species are in the UK?
There are only two native snake species in the UK: the adder and the smooth snake.
Are UK snakes dangerous to humans?
The adder is venomous but rarely poses a serious threat; the smooth snake is harmless. Most snake bites are avoidable with proper caution.
Where can I see UK snakes in the wild?
Adder populations are widespread across heathlands, grasslands, and woodland edges. The smooth snake is rarer and found in specific protected areas, often in southern England.
Are snakes in the UK protected by law?
Yes, both the adder and smooth snake are protected under UK law, which prohibits their killing, injury, or disturbance.
Can I keep a snake as a pet in the UK?
While some non-native snakes are kept as pets, it is illegal to keep native UK snakes without proper licenses, and they are generally protected in the wild.
What should I do if I see a snake in the UK?
Observe from a distance and do not attempt to handle or disturb it. Most UK snakes are harmless and prefer to avoid humans.
In summary, the UK hosts only two native snake species, each with unique characteristics and conservation needs. Their presence enriches the country’s biodiversity and highlights the importance of habitat conservation and legal protection.
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