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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 ›
Giant hogweed
Heracleum mantegazzianum
Status:
Established
Habitat:
Terrestrial
Threats:
Public health hazard. Competition with native species.
Find out more ›
Giant knotweed
Fallopia sachalinensis
Status:
Established
Habitat:
Terrestrial
Threats:
Quick growing and difficult to control. Habitat generalist.
Find out more ›
Giant rhubarb
Gunnera tinctoria
Status:
Established
Habitat:
Terrestrial
Threats:
Competition with native species.
Find out more ›
Grey squirrel
Sciurus carolinensis
Status:
Established
Habitat:
Terrestrial
Threats:
Threatens red squirrel and woodlands.
Find out more ›
Harlequin ladybird
Harmonia axyridis
Status:
Established
Habitat:
Terrestrial
Threats:
Alert: Specimen found in Ireland.
Find out more ›
Himalayan balsam
Impatiens glandulifera
Status:
Established
Habitat:
Terrestrial
Threats:
Competition with native plants & collapsing of river banks
Find out more ›
Himalayan honeysuckle
Leycesteria formosa
Status:
Established
Habitat:
Terrestrial
Threats:
Can form dense thickets, dominating the habitat and outcompeting native flora for light and space
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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