Management Measures for Widely Spread Species

A Widely Spread Species is a species that is on the Species of Union Concern list and is considered established and widely spread in Northern Ireland.

Article 19 of EU Regulation (1143/2014) requires Member States to produce effective management measures for each of the selected Widely Spread Species. These measures will endeavour to minimise the potential negative impact upon biodiversity, related ecosystem services, human health and the economy that these 11 species could have.

The 11 Widely Spread Species in Northern Ireland and their associated management measures are listed below, they consist of 8 plants and 3 animals.



 Nuttall’s waterweed (Elodea nuttallii)


New Zealand Flatworm (Arthurdendyus triangulatus)


Chilean rhubarb (Gunnera tinctoria)

Grey squirrel (Sciurus carolinensis)

Giant hogweed (Heracleum mantegazzianum)

Slider terrapins (Trachemys scripta spp.)

Floating pennywort (Hydrocotyle ranunculoides)

Himalayan balsam (Impatiens glandulifera)

Curly waterweed (Lagarosiphon major)

American skunk cabbage (Lysichiton americanus)

Parrot’s feather (Myriophyllum aquaticum)






Invasive Species Ireland

Invasive Species Ireland