INNS are responsible for 16% of global animal and plant extinctions 

In Britain, non-native plants now outnumber native ones. Whilst only 10-15% of these species are invasive, those that are can take over entire habitats at a concerning rate.

Invasive plants block out sunlight and strangle native species, rendering them unable to support the multitude of species which have evolved over millennia for our unique Scottish habitats.

The financial impact of INNS in Scotland has been estimated at £200 million a year

As well as outcompeting native species, invasive plants can also be physically destructive, causing riverbank erosion, destabilising buildings and damaging access infrastructure.

Perhaps most concerningly, they can also have an adverse effect on human and animal health, impacting people, pets and livestock.



Invasive Non-Native Species are one of the top five drivers of global biodiversity loss.

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INNS are one of the greatest threats to global biodiversity – even more than pollution or climate change.

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INNS management on our wildlife reserves is a year-round task. The map on the right shows where some of this work is needed the most.

  1. Spey Bay: Removing Japanese knotweed will help native pollinators like the small blue butterfly thrive.
  2. Tummel Shingle Islands: Skunk cabbage and lupin control is critical to protect exposed sand and shingle.
  3. Shewalton Sandpits: Proximity to a rivermouth makes this reserve vulnerable to alien seed sources washing downstream.
  4. Nethan Gorge: New mapping techniques could help us control Himalayan balsam here.
  5. Bawsinch and Duddingston Loch: Year-round removal of giant hogweed is required at this reserve.

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