Invasive Species Northern Ireland

Japanese skeleton shrimp

Caprella mutica

Status:

Established

Habitat:

Marine

Threats:

Reproduces quickly. Outcompetes native species.

Find out more ›

Leathery sea squirt

Styela clava

Status:

Established

Habitat:

Marine

Threats:

Competes against native species for food and space. Fouls boats, oyster beds and moorings

Find out more ›

Mandarin Duck

Aix galericulata

Status:

Established

Habitat:

Terrestrial

Threats:

Could compete with other hole-nesting ducks such as Goldeneye and Goosander for nesting habitat

Find out more ›

Montbretia

Crocosmia X crocosmiiflora

Status:

Established

Habitat:

Terrestrial

Threats:

Outcompetes native species. Can cause streambank collapse if population is too high.

Find out more ›

Muntjac deer

Muntiacus reevesi

Status:

Established

Habitat:

Terrestrial

Threats:

Preventing seed regeneration of important conservation species.

Find out more ›

New Zealand flatworm

Arthurdendyus triangulatus

Status:

Established

Habitat:

Terrestrial

Threats:

Significant reduction of native earthworms.

Find out more ›

New Zealand pigmyweed

Crassula helmsii

Status:

Established

Habitat:

Freshwater

Threats:

Competition with native species.

Find out more ›

Nuttalls waterweed

Elodea nuttallii

Status:

Established

Habitat:

Freshwater

Threats:

Negative impacts on native macrophytes and invertebrates.

Find out more ›

Pacific oyster

Magallana gigas

Status:

Established

Habitat:

Marine

Threats:

Encrusts hard surfaces

Find out more ›