Identification of invasive species is the key to successful management and control.The following identification sheets have been produced by NNSS and are available for you to download for free.

Please click on the image to download the relevant identification sheet.

Once you are sure of your identification, please help us by submitting your record.

Invasive Plants
Duckweed
Common Duckweed (Lemna minor)
New Zealand Pigmyweed
New Zealand pigmyweed (Crassula helmsii)
Canadian Waterweed
Canadian Waterweed (Elodea canadensis)
Floating Pennywort
Floating Pennywort (Hydrocotyle ranunculoides)
Himalayan Balsam
Himalayan Balsam (Impatiens glandulifera)
Marsh Pennywort
Marsh Pennywort (Hydrocotyle vulgaris)
Curly Waterweed
Curly Waterweed (Lagarosiphon major)
Mares Tail
Mares Tail (Hippuris vulgaris)
Nuttall's Waterweed
Nuttall’s waterweed (Elodea canadensis)
Parrots Feather
Parrots Feather (Myriophyllum aquaticum)
Common Water Crowfoot
Common water-crowfoot (Ranunculus aquatilis)
Rigid Hornwort
Rigid hornwort (Ceratophyllum demersum)
Water Fern
Water Fern (Azolla filiculoides)
Water Primrose
Water Primrose (Ludwigia grandiflora)
Large Water-starwort
Large water-starwort (Callitriche heterophylla)
Yellow Iris
Yellow Iris (Iris pseudacorus)
Invasive Animals
Alpine Newt
Alpine Newt (Ichthyosaura alpestris)
American Mink
American Mink (Mustela vison)
European Polecat
European polecat (Mustela putorius)
Zebra Mussel (Dreissena Polymorpha)
Zebra Mussel (Dreissena polymorpha)