Introduced species
An introduced species or invasive species is an animal or plant accidentally or deliberately taken to an area where it is not native by human activity. The term does not refer to natural colonisation.
Some species, such as the House Sparrow, Ring-necked Pheasant and European Starling have been introduced very widely.
Introduceed species often become serious pests, competing with native species, or multiplying rapidly in the absense of a natural predator. Because of this many are culled to reduce their numbers or even eradicate them.
Other example include:
Mammals
- Rabbit from Europe
- Stoat from Europe
- Red Deer from Europe
- Sika Deer from Asia
- Brown Opossum from Australia
- Hedgehog from Europe
- Brush-tailed Rock Wallaby (and some other wallabies from Australia
Birds
- Blackbird from Europe
- Dunnock from Europe
- Common Myna from India
Mammals
- Rabbit from continental Europe
- Fallow Deer from continental Europe
- Grey Squirrel from America
- Mink
- Red-Necked Wallaby
- Muntjac Deer
- Feral Goat
- Sika Deer from Asia
- Chinese Water Deer
- Edible Dormouse
Birds
- Ruddy Duck from America
- Little Owl from mainland Europe
- Ring-necked Parakeet from Asia
- Golden Pheasant from Asia
- Canada Goose
Fish
Amphibians
Reptiles
Crustaceans
Insects
Plants
- Japanese Knotweed
- Rhododendron
- Oxford Ragwort
- Hottentot fig
- Fox and Cubs
- Jewelweed
- Giant Hogweed
- Willow herb
- Evening Primrose
- Water Fern
- Autumnal Crocus
- Pigmy Weed
- Least Duckweed
- Canada Pond Weed
- Bermuda Buttercup
- Guernsey Fleabane
- Rhododendron Floating Pennywort
- Purple Dewplant
- Himalayan Balsam
- Field Speedwell
- Purple Pitcher
Mammals
- Red Squirrel from Europe
Birds
- House Sparrow from Europe
- Starling from Europe
- Monk Parakeet from Asia
Fish
- Round goby from Eurasia
- Eurasian Ruffe from Eurasia
- Common carp from Europe
- Sea lamprey, introduced into the Great Lakes through the Welland canal c.1921
- Tubenose goby from Europe
Crustaceans
- European green crab from Atlantic coasts of Europe, northern Africa, from Norway to the British Isles south to Mauritania
- Chinese mitten crab from the coastal rivers and estuaries of the yellow sea
- Japanese shore crab from Japan
- Spiny waterflea from northern Europe and western Russia
- Fishhook waterflea from the Ponto-Caspian region
- Zebra mussel from the Caspian and Black Seas
Plants
- Eurasian Water-milfoil from Europe, Asia and northern Africa