Many people in the UK keep pets that come from faraway parts of the world – fish, reptiles, birds, plants, and small mammals that bring colour and life into our homes. But if these animals or plants escape or are released into the wild, they can cause serious harm to local wildlife and ecosystems. Non-native species can outcompete native ones, spread disease, and disrupt natural habitats. As pet owners, we all share a responsibility to prevent this from happening.

Why is it a problem?

When a species that does not naturally belong in the UK is released into the wild, it can spread quickly and upset the balance of nature. Some species have no natural predators here, allowing them to multiply and push out native animals and plants.

A well-known example is the red-eared slider turtle, once a popular pet. Many owners released them into ponds and lakes when they grew too large, and they have since been found in the wild across the country, where they compete with native amphibians and birds. Similarly, aquarium fish and plants can survive surprisingly well in British waterways, where they may alter habitats and threaten native species. Even tiny snails or plant fragments from an aquarium can start an unwanted invasion.

What does the law say?

It is illegal to release any animal or plant into the wild if it is not native to the UK. This includes pets, aquarium species, and garden plants. Breaching these rules can lead to fines or prosecution under the Wildlife and Countryside Act 1981 and the Invasive Alien Species (Enforcement and Permitting) Order 2019.

If you are unsure whether a species is allowed, you can check the UK Government’s list of invasive non-native species of concern. The list shows which animals and plants are banned from being kept, sold, or released.

What if you can no longer keep your pet?

Sometimes circumstances change – a pet grows too large, becomes too demanding, or you have to move home. But releasing it into the wild is never the right solution.

Here are some better options:

• Contact an animal rescue centre or rehoming charity that can help find a new home for your pet.
• Ask the pet shop or breeder where you bought it – some will take animals back or help you find a new owner.
• Look for responsible online pet communities where experienced keepers can adopt animals in need.
• If the animal is unwell or cannot be rehomed, seek advice from a vet about humane options.

The most important thing is to ensure your pet does not end up in the wild, where it could suffer or harm other species.

Be careful with aquarium water and plant waste

Even small amounts of aquarium water or plant material can contain eggs, larvae, or fragments that survive outdoors. When cleaning your tank, always pour the water down the drain, not into the garden, a pond, or a roadside drain. Dispose of plants, gravel, and substrate in general waste, not in compost or green waste bins, where they could spread.

Think ahead before getting a pet

Before buying a pet, it’s worth thinking long-term. How big will it grow? How long will it live? Can you provide the right conditions? Many problems arise because owners underestimate how demanding a species can become.

• Research the species thoroughly before buying.
• Buy only from reputable, legal sources.
• Avoid species listed as invasive or potentially harmful to the environment.

By making informed choices, you can protect both your pet and the natural world.

Læs også:

Moving with Pet Allergies – How to Plan Your Move Effectively

Domestic animals

Moving to a new home can be stressful, especially when pet allergies are involved. Learn how to prepare, clean, and organize your move to minimize allergens and create a fresh, healthy start in your new space.

Temporary stay? How to best look after your pet’s wellbeing

Domestic animals

Whether you’re travelling, relocating, or facing a short-term separation, your pet’s wellbeing remains a top priority. Discover practical tips on choosing the right care, preparing your pet for the stay, and making their time apart from you as stress-free as possible.

Avoid Spreading Unwanted Species from Pets to the Wild

Domestic animals

Exotic pets can bring joy and beauty into our homes, but if released or allowed to escape, they may harm native species and ecosystems. Learn how to care for your pets responsibly and prevent the spread of unwanted species into the wild.

When Your Pet Gets Older – Changing Insurance Needs

Domestic animals

As pets age, their health and lifestyle evolve—and so should their insurance. Learn how to review and adjust your pet’s policy to ensure they stay protected and you stay prepared for the years ahead.

A shared responsibility for nature

Caring for pets is not just about the animals we keep – it’s also about respecting the environment we all share. Every time we prevent a non-native species from escaping, we help protect Britain’s wildlife and ecosystems. A little care and awareness can make a big difference.