List of invasive species in Italy

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)

Platyhelminthes

 * Bothriocephalus acheilognathi (Asian tapeworm)

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)
 * 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)

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)
 * Procyon lotor (Common raccoon)

Reptiles

 * Trachemys scripta elegans (Red-eared slider)