Invasive Alien Species

Derry City and Strabane District Council have been working with a range of partners to raise awareness, understanding and action of invasive alien species. Invasive alien species are species that have been (un)intentionally introduced into Northern Ireland from around the world. They are the second largest threat to biodiversity worldwide as they compete for habitat space, can change food supply, impact on public health, cause erosion, sedimentation, infrastructure and economic damage.

Council conduct invasive alien species surveys of all its green spaces, produce management plans and implement control programmes on Council owned land. We offer advice to members of the public on how to identify and control these species if they are on private residential property within the district.

The key invasive alien species within the district are Japanese knotweed, Giant hogweed, Himalayan balsam and grey squirrels. For further information on invasive alien species visit: