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Canadian waterweed
Elodea canadensis
Status:
Established
Habitat:
Freshwater
Threats:
Creates single species stands. Outcompetes native plants. Reduces waterflow.
Find out more ›
Carpet sea squirt
Didemnum vexillum
Status:
Established
Habitat:
Marine
Threats:
Alter marine habitats.
Find out more ›
Chub
Squalius cephalus
Status:
Established
Habitat:
Freshwater
Threats:
Negative impacts on native salmonid species. Associated economic impacts.
Find out more ›
Clematis vitalba
Clematis vitalba
Status:
Established
Habitat:
Terrestrial
Threats:
Outcompetes native species. Lowers plant biodiversity.
Find out more ›
Cotoneaster
Cotoneaster spp.
Status:
Established
Habitat:
Terrestrial
Threats:
Outcompetes native species. Easily spread.
Find out more ›
Curly waterweed
Lagarosiphon major
Status:
Established
Habitat:
Freshwater
Threats:
Significant changes to the ecology of the invaded habitat for native plants, insects and fish.
Find out more ›
Devil’s tongue weed
Grateloupia turuturu
Status:
Established
Habitat:
Marine
Threats:
Outcompetes native species. Can survive in a wide range of habitats.
Find out more ›
Feral ferret
Mustela furo
Status:
Established
Habitat:
Terrestrial
Threats:
Threatens protected bird species.
Find out more ›
Few-flowered garlic
Allium paradoxum
Status:
Established
Habitat:
Terrestrial
Threats:
Outcompetes native species. Spreads quickly.
Find out more ›
Invasive Species Northern Ireland
Invasive Species Northern Ireland
About ISNI
About Invasive Species
Research
Invasive Species Maps
Back
Legislation
International
European Union
Species of Union Concern
Widely Spread Species in NI
Back
Northern Ireland Only
Back
Species Accounts
Species Alerts
List of identification guides
Back
Biosecurity & Prevention
What can I do?
Check Clean Dry
Guidance for Anglers
Guidance for Boaters
Guidance for canoeists, kayakers and stand up paddle boarders
Guidance for Aquaculture
Guidance for field workers
Guidance for Divers
Guidance for clubs and managers of water bodies
Guidance for events
Check Clean Dry Resources
Back
Be Pet Wise
Pet Owners
Pet Traders
Be Pet Wise Resources
Back
Be Plant Wise
Are you a retailer?
Are you a gardener/pond owner?
Know What You Grow
Stop The Spread
Compost with Care
Be Plant Wise Resources
Back
Back
Pathway Action Plans
Back
Managing the Problem
Invasive Plant Management
Site Management Resources
Back
Resources
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