Invasive Non-Native Species Group

Invasive Species

Invasive Non-native Species (INNS) are plants, animals, fungi and microorganisms which have been introduced to parts of the world where they would not naturally be found. They have the ability to spread causing damage to the environment, the economy, our health and the way we live. INNS are the second greatest threat to biodiversity after habitat loss and fragmentation. INNS have been estimated to cost the UK economy at least £1.8 billion pounds annually, they mainly affect farming and horticultural sectors but can affect transport, construction, recreation, aquaculture and utilities.

Wales Invasive Non-native Species Group

The Wales Invasive Non-native Species Group was formed to help identify INNS priorities and resolve issues relevant to Wales. The group acts as a source of expertise on INNS in Wales. The group generally meets three times a year. It’s work programme is focused on action under 5 key topic areas – promoting action, raising awareness, sharing best practice, information exchange and expertise. Membership includes representatives from Wales Biodiversity Partnership, Academia, GB Non-Native Species Secretariat, Local Authorities, Natural Resources Wales, Public Health Wales, Wales Environment Link, Welsh Government, the Welsh Local Government Association and Utility companies.

  1. Invasive Non-native Species Group Membership

To get in touch with the group please contact us.

Himalayan Balsam

Great Britain Invasive Non-native Species Strategy

The GB Invasive Non-native Species Strategy provides a framework on how to minimise the risks posed by INNS. The strategy sets out key aims and actions for addressing the threats posed by INNS. The current strategy covers 2015 to 2020 and replaces the first strategy published in 2018.

  1. GB Invasive Non-native Species Strategy

Non-native species records help us understand how many INNS species are present in Britain, and the rate at which they are spreading. Everyone can provide useful biological records of non-native species, and with the development of online recording sites and smartphone apps it is now easier than ever. Sightings of INNS should be reported in accordance with GB Non-native Species Secretariat guidance.

Some species are highly invasive and are classed as ‘Alert Species’. It is particularly important to report these species if sighted.

The distribution of Invasive Non-native Species in Wales can be viewed on the NBN Atlas Wales.

Action is taking place across Wales and GB by various groups, projects and organisations to help reduce the risks and impacts associated with invasive non-native species.

There are a number of Local Action Groups active in Wales tackling invasive species including the Dee Invasive Non-Native Species Project. The project is a catchment-wide partnership initiative which aims to coordinate the control and monitoring of invasive non-native species (INNS) within the Dee catchment to ensure a joined-up approach to INNS management is delivered.

  1. Local Action Groups
  2. Local Action Groups in Wales poster (PDF)

The Wales Invasive Non-Native Species Group maintains a list of Priority Species for Action in Wales. This list can be used to help focus action on INNS in Wales. Species are listed under three categories – prevention priority species (those not yet in the wild but likely to arrive), management priority species (those present in the wild in low numbers) and long-term management priority species (those established in the wild)

  1. INNS Priority Species for Action in Wales (PDF)
  2. Marine Invasive Non-native Species: Priority Monitoring and Surveillance List for Wales

Biosecurity is about lowering the risk of introducing or spreading INNS (and other harmful organisms such as disease) in the wild.

When visiting sites with water follow these steps:

  • CHECK all clothing and equipment
  • CLEAN clothes and equipment on site
  • DRY thoroughly dry equipment and clothing
  1. Check Clean Dry
  2. Biosecurity e-learning module

Species in Wales

Amphibians & Reptiles



Terrestrial Mammals



Helping Wildlife

Wildlife Gardening