Many species of plants, animals, and other organisms are considered invasive species in Italy.
Plants
Ailanthus altissima (Tree of heaven) Amorpha fruticosa (Desert false indigo) Ambrosia artemisiifolia (Amrosia artemisifolia) Carpobrotus edulis (Hottentot fig) Caulerpa racemosa (Grape caulerpa) Caulerpa taxifolia, Mediterranean clone Crassula helmsii (Australian swamp stonecrop) Eichhornia crassipes (Water hyacinth) Elodea canadensis (Canadian pondweed) Gleditsia triacanthos (Honey locust) Heracleum mantegazzianum (Giant hogweed) Hydrocotyle ranunculoides (Floating pennywort) Impatiens glandulifera (Himalayan balsam) Myriophyllum aquaticum (Parrot feather) Reynoutria japonica (syn. Fallopia japonica) (Japanese knotweed) Robinia pseudoacacia (Black locust)
Fungi Ophiostoma ulmi (Dutch elm disease)
Animals
Platyhelminthes Bothriocephalus acheilognathi (Asian tapeworm) Bipalium kewense (Shovel-headed garden worm)
Molluscs
Marine
Crassostrea gigas (Pacific oyster) Crepidula fornicata (Common slipper shell) Rapana Venosa (Veined rapa whelk)
Freshwater Corbicula fluminea (Freshwater bivalve mollusk) Dreissena polymorpha (Zebra mussel) Potamopyrgus antipodarum (New Zealand mud snail) Sinanodonta woodiana (Chinese pond mussel)
Crustaceans
Dikerogammarus villosus (Killer shrimp) Eriocheir sinensis (Chinese mitten crab) Orconectes limosus (Eastern crayfish) Pacifastacus leniusculus (Signal crayfish) Procambarus clarkii (Louisiana crawfish)
Insects
Aedes albopictus (Asian tiger mosquito) Brachyponera chinensis (Asian needle ant) Cacyreus marshalli (Geranium bronze) Dryocosmus kuriphilus (Chestnut gall wasp) Drosophila suzukii (Spotted-wing drosophila) Harmonia axyridis (Asian lady beetle) Leptinotarsa decemlineata (Colorado beetle) Linepithema humile (Argentine ant) Ricania speculum (Black planthopper) Solenopsis invicta (Red imported fire ant)
Amphibians Lithobates catesbeianus (American Bullfrog) Xenopus laevis (African clawed frog)
Birds
Alopochen aegyptiacus (Egyptian goose) Myiopsitta monachus (Monk parakeet) Psittacula krameri (Rose-ringed parakeet)
Fish Ameiurus melas (Black bullhead) Gambusia affinis (Eastern mosquitofish) Lepomis gibbosus (Pumpkinseed sunfish) Pseudorasbora parva (Stone moroko) Micropterus salmoides (Largemouth Bass)
Mammals
Eutamias sibiricus (Siberian chipmunk) Callosciurus finlaysonii (Finlayson's squirrel) Mustela vison (American mink) Myocastor coypus (Coypu, nutria) Nyctereutes procyonoides (Raccoon dog) Ondatra zibethicus (Muskrat) Rattus norvegicus (Brown rat) Rattus rattus (Black rat) Sciurus carolinensis (Grey squirrel) Beaver Striped skunk Giant anteater Aardvark Striped hyena Tapir Virginia opossum Procyon lotor (Common raccoon)
Reptiles Trachemys scripta elegans (Red-eared slider)
References