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Alien Species Invading The British Isles

June 15, 2008
clipped from www.introduced-species.co.uk
Introduced
species in the British Isles















clipped from www.guardian.co.uk

Grey Squirrel

Some of Britain’s best loved wildlife, including bluebells, red squirrels and water voles, are threatened by invasive species. The red squirrel has suffered since the introduction in the 19th century of the stronger, more adaptable, grey squirrel

clipped from www.guardian.co.uk

red eared terrapins

Red-eared terrapins, originally from the US, are foot-long former pets that can terrorise ducklings

clipped from ecoworldly.com

the American Signal Crayfish
described as a six inch long killing machine and voracious predator that has already annihilated the native White Claw species, and now threatens to completely overwhelm many fragile aquatic eco-systems
clipped from www.guardian.co.uk
British bluebells are threatened because they hybridise with Spanish bluebells

Bluebells
clipped from www.guardian.co.uk

American Mink
American mink
blamed for the collapse in water vole numbers
clipped from www.guardian.co.uk

Hogweed

Some invaders pose a risk to human health, like this giant hogweed, whose sap causes blistering

clipped from www.guardian.co.uk

Azolla fern
Azolla fern
clipped from www.guardian.co.uk

Japanese knotweed
clipped from www.guardian.co.uk

Water Pennywort
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