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African clawed frog
Xenopus laevis
Status:
Potential
Habitat:
Freshwater
Threats:
Competes with and predates on native species. Clogs water pipes and invade houses. A vector for parasites.
Find out more ›
Alligator weed
Alternanthera philoxeroides
Status:
Potential
Habitat:
Freshwater
Threats:
Chokes up riverine habitats when it becomes established
Find out more ›
American bullfrog
Lithobates catesbeianus
Status:
Potential
Habitat:
Freshwater
Threats:
Can outcompete and displace native species. Spreads diesease.
Find out more ›
Amur sleeper
Perccottus glenii
Status:
Potential
Habitat:
Freshwater
Threats:
Voracious predator of amphibians and fish. Outcompetes native species. Possible disease vector
Find out more ›
Apple snails
Pomacea spp.
Status:
Potential
Habitat:
Freshwater
Threats:
Alter aquatic ecosystems, increasing nutrient concentrations and phytoplankton biomass. A vector for harmful parasites.
Find out more ›
Black Bullhead Catfish
Ameiurus melas
Status:
Potential
Habitat:
Freshwater
Threats:
Competes with native wildlife for food and space and reduces native fish species, consuming fish and eggs
Find out more ›
Broadleaf watermilfoil
Myriophyllum heterophyllum
Status:
Potential
Habitat:
Freshwater
Threats:
It creates mats that impede the water flow and reduce sunlight and oxygen availability.
Find out more ›
Brown bullhead catfish
Ameiurus nebulosus
Status:
Potential
Habitat:
Freshwater
Threats:
Negative impacts on native fish species.
Find out more ›
Chinese mitten crab
Eriocheir sinensis
Status:
Potential
Habitat:
Freshwater
Threats:
Threatens ecosystem functioning and protected species.
Find out more ›
Invasive Species Northern Ireland
Invasive Species Northern Ireland
Invasive Species Week
Invasive Species Week 2023
Five things you can do
Do one thing for nature pledge
Ideas for events and activities
Useful Resources
Back
Invasive Species Week 2022
ISW 2022 Events & Webinars
Back
Back
About ISNI
Research
Invasive Species Maps
Back
Legislation
EU IAS Regulation
Management Measures for Widely Spread Species
Back
Northern Ireland
Policy Documents for Northern Ireland
Back
Species Accounts
Species Alerts
American lobster – Retain & Report
List of identification guides
Back
What can I do?
Invasive Plant Management
Site Management Resources
Back
Biosecurity & Prevention
Pathway Action Plans
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 clubs and managers of water bodies
Guidance for events
Check Clean Dry Resources
Back
Be Pet Wise
Be Plant Wise
Back
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