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Freshwater
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Red Imported Fire Ant
Solenopsis invicta
Status:
Potential
Habitat:
Terrestrial
Threats:
Damage electrical equipment, feed on commercially important crops; competition with, predation and stinging of other animals
Find out more ›
Red king crab
Paralithodes camtschaticus
Status:
Potential
Habitat:
Marine
Threats:
Competition with native species.
Find out more ›
Red swamp crayfish
Procambarus clarkii
Status:
Potential
Habitat:
Freshwater
Threats:
Outcompetes the native European crayfish. Degrades riverbanks through burrowing
Find out more ›
Red-vented bulbul
Pycnonotus cafer
Status:
Potential
Habitat:
Terrestrial
Threats:
Destroys commercially important crops. May spread invasive plant seeds. Competes with native birds for food and space
Find out more ›
Ruffe
Gymnocephalus cernuus
Status:
Potential
Habitat:
Freshwater
Threats:
Negative impacts on native fish communities.
Find out more ›
Rugulopteryx okamurae
Rugulopteryx okamurae
Status:
Potential
Habitat:
Marine
Threats:
Displaces native species, reduces biodiversity and alters community structure. Floating biomass impacts fisheries and tourism
Find out more ›
Rusty Crayfish
Faxonius rusticus
Status:
Potential
Habitat:
Freshwater
Threats:
Outcompete native crayfish for food and resources, reduce aquatic vegetation cover
Find out more ›
Sacred ibis
Threskiornis aethiopicus
Status:
Potential
Habitat:
Terrestrial
Threats:
It outcompetes and predates on native water birds
Find out more ›
Salvinia moss
Salvinia molesta
Status:
Potential
Habitat:
Freshwater
Threats:
Grows rapidly. Spreads vegetatively. May smother out other plants.
Find out more ›
Invasive Species Northern Ireland
Invasive Species Northern Ireland
About ISNI
About Invasive Species
Research
Invasive Species Maps
Invasive Species Week
Invasive Species Week 2025
Ideas for events and activities
Five things you can do
Useful Resources
Back
Back
Back
Legislation
European Union
Species of Union Concern
Widely Spread Species in NI
Back
Northern Ireland Only
International
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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