Mesquite
Prosopis juliflora
Status:
Potential
Habitat:
Terrestrial
Threats:
Outcompetes native flora for recources
Montbretia
Crocosmia X crocosmiiflora
Status:
Established
Habitat:
Terrestrial
Threats:
Outcompetes native species. Can cause streambank collapse if population is too high.
Muntjac deer
Muntiacus reevesi
Status:
Established
Habitat:
Terrestrial
Threats:
Preventing seed regeneration of important conservation species.
Muskrat
Ondatra zibethicus
Status:
Potential
Habitat:
Terrestrial
Threats:
They change the composition of native wetland vegetation, and their burrowing degrades river banks.
New Zealand flatworm
Arthurdendyus triangulatus
Status:
Established
Habitat:
Terrestrial
Threats:
Significant reduction of native earthworms.
New Zealand pigmyweed
Crassula helmsii
Status:
Established
Habitat:
Freshwater
Threats:
Competition with native species.
North American signal crayfish
Pacifastacus leniusculus
Status:
Potential
Habitat:
Freshwater
Threats:
Detrimental impacts on white clawed crayfish. Human health impacts.
Nuttalls waterweed
Elodea nuttallii
Status:
Established
Habitat:
Freshwater
Threats:
Negative impacts on native macrophytes and invertebrates.
Oak Processionary Moth
Thaumetopoea processionea
Status:
Potential
Habitat:
Terrestrial
Threats:
Tree pest. Health risk to humans and animals.
Invasive Species Ireland

Invasive Species Ireland