Invasive species ID

It is important to know your INNS. By recognising these species you will get a better understanding of what should and should not be here. You will also help us to better understand the extent of the spread of these species. 

These ID sheets explain the main characteristics of each species. They also highlight the similarities and differences between these invaders and some of our native species that look very similar.

American Signal Crayfish

American Signal Crayfish

American Skunk Cabbage

American Skunk Cabbage

Japanese Knotweed

Japanese Knotweed

Chinese Mitten Crab

Chinese Mitten Crab

Curly Waterweed

Curly Waterweed

Giant Hogweed

Giant Hogweed

Floating Pennywort

Floating Pennywort

Himalayan Balsam

Himalayan Balsam

Killer Shrimp

Killer Shrimp

New Zealand Pigmyweed

New Zealand Pigmyweed

Parrots Feather

Parrots Feather

Water Fern

Water Fern

Zebra Mussel

Zebra Mussel

Water Primrose

Water Primrose

American Mink