View source for 100 of the World's Worst Invasive Alien Species

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'''100 of the World's Worst Invasive Alien Species''' is a list of [[invasive species]] compiled in 2000 from the [[Global Invasive Species Database]], a database of invasive species around the world.<ref name=100WW>{{cite web |url=https://www.iucngisd.org/gisd/100_worst.php |url-status=live |title=100 of the World's Worst Invasive Alien Species |website=Global Invasive Species Database |publisher=IUCN |access-date=11 December 2023 |archive-url=https://web.archive.org/web/20231030075221/https://www.iucngisd.org/gisd/100_worst.php |archive-date=30 October 2023}}</ref><ref>{{cite web |url=https://www.iucngisd.org/gisd/pdf/100English.pdf |title=A Selection from the Global Invasive Species Database |publisher=IUCN |date=2004 |orig-date=2000 |access-date=12 December 2023}} ISSG booklet giving the original 100 species.</ref> The database is run by the Invasive Species Specialist Group (ISSG) of the [[International Union for Conservation of Nature]] (IUCN). The ISSG acknowledges that it is "very difficult to identify 100 invasive species from around the world that really are 'worse' than any others. ... Absence from the list does not imply that a species poses a lesser threat."<ref name=100WW /> In 2013, the ISSG updated their list to supersede the recently eradicated † ''[[rinderpest]] virus'', and a few genus and species names were altered.
== Criteria for inclusion ==
Two criteria were used in selecting items for the list:
* An invasive species' "serious impact on biological diversity and/or human activities," and
* That species' "illustration of important issues surrounding biological invasion".<ref name=100WW />
According to the ISSG, "only one species from each genus was selected."<ref name=100WW /> However, the renaming of ''[[Miconia crenata|Clidemia hirta]]''<ref name=crenata>{{cite web |url=https://www.worldfloraonline.org/taxon/wfo-0001429190 |title=Miconia crenata (Vahl) Michelang |website=[[World Flora Online]] |access-date=13 December 2023}}</ref> now implies two ''Miconia'' species in the list.
== List of species ==
This list has been updated to reflect later changes in taxonomy, to ensure alphabetical order of genera, and to remove apparent errors. Common names may be ambiguous.
{| class="wikitable sortable"
|-
! Genus & species
! Type
! class="unsortable" | Common names
! class="unsortable" | Notes
|-
| ''[[Acacia mearnsii]]''
| Shrub
| Black wattle, Australian acacia
| Invasive worldwide. Native to Australia.
|-
| ''[[Common myna|Acridotheres tristis]]''
| Bird
| Calcutta myna, [[common myna]], house myna, Indian myna, mina, minah, mynah, talking myna
| Invasive in Australia, Hawaii, Fiji and New Zealand. Established and potentially invasive in parts of Europe. Native to South Asia.
|-
| ''[[Aedes albopictus]]''
| Insect
| Asian tiger mosquito, forest day mosquito, tiger mosquito
| Invasive worldwide. Native to Southeast Asia.
|-
| ''[[Anopheles quadrimaculatus]]''
| Insect
| Common [[malaria]] mosquito
| Invasive in the eastern United States.
|-
| ''[[Yellow crazy ant|Anoplolepis gracilipes]]''
| Insect
| Crazy ant, gramang ant, long-legged ant, Maldive ant, [[yellow crazy ant]]
| Invasive in Australia, Hawaii, and Indian Ocean islands.
|-
| ''[[Asian long-horned beetle|Anoplophora glabripennis]]''
| Insect
| [[Asian long-horned beetle]], starry sky beetle
| Invasive in North America, and established and potentially invasive in parts of Europe. Native to East Asia.
|-
| ''[[Crayfish plague|Aphanomyces astaci]]''
| [[Pseudofungi|Pseudo-fungus]]
| [[Crayfish plague]]
| Invasive in Europe. Native to North America.
|-
| ''[[Ardisia elliptica]]''
| Tree
| Coralberry, duck's eye, shoebutton ardisia
| Invasive in tropical Australia, South Florida, the Caribbean, and many Pacific and Indian Ocean islands. Native to South and Southeast Asia.
|-
| ''[[Arundo donax]]''
| Grass
| Arundo grass, bamboo reed, cane, cow cane, donax cane, giant cane, giant reed, reedgrass, river cane, Spanish cane, Spanish reed, wild cane
| Invasive in California and New Zealand.
|-
| ''[[Asterias amurensis]]''
| Echinoderm
| Flatbottom sea star, Japanese sea star, Japanese starfish, North Pacific sea star, Northern Pacific sea star, purple-orange sea star
| Invasive in the southern coasts of Australia. Native to far north Pacific Ocean coasts.
|-
| ''[[Banana bunchy top virus|Babuvirus Banana bunchy top virus]]''
| Virus
| Banana bunchy top disease, BBTD, BBTV, bunchy top, bunchy top virus
| Invasive worldwide.
|-
| ''[[Batrachochytrium dendrobatidis]]''
| Fungus
| Amphibian chytrid fungus, "Bd", chytrid frog fungi, chytridiomycosis, frog chytrid fungus
| Invasive in Australia, New Zealand, and Panama.
|-
| ''[[Silverleaf whitefly|Bemisia tabaci]]''
| Insect
| Cotton whitefly, [[silverleaf whitefly]], sweet potato whitefly, sweetpotato whitefly
| Native to India, invasive worldwide.
|-
| ''[[Brown tree snake|Boiga irregularis]]''
| Reptile
| Brown catsnake, [[brown tree snake]], brown treesnake
| Invasive in Guam. Native to [[Wallacea]], New Guinea, Melanesia, and Northern and Eastern Australia.
|-
| ''[[Goat|Capra hircus]]''
| Mammal
| Domestic goat, [[feral goat]], [[goat]]
| Invasive worldwide. See also [[feral goats in Australia]].
|-
| ''[[Carcinus maenas]]''
| Crustacean
| European green crab, European shore crab, green crab, shore crab
| Invasive in North America, Australia, parts of South America and South Africa. Native to Europe and North Africa.
|-
| ''[[Caulerpa taxifolia]]''
| Seaweed
| Killer algae, killer seaweed
| Invasive in the Mediterranean Sea. Native to the Indian Ocean.
|-
| ''[[Cecropia peltata]]''
| Tree
| Faux-ricin, pumpwood, snakewood, trumpet tree
| Invasive in Malaysia, Africa, and Pacific Islands. Native to tropical Central and South America.
|-
| ''[[Cercopagis pengoi]]''
| Crustacean
| Fishhook waterflea
| Invasive in Eastern Europe and in the Baltic Sea. Native to the Ponto-Aralo-Caspian basin.
|-
| ''[[Red deer|Cervus elaphus]]''
| Mammal
| [[Red deer]], European red deer, western red deer, elk{{efn|Not ''Alces alces'', called "elk" in Eurasia, and "[[moose]]" in North America; nor ''Cervus canadensis'', called "[[elk]]" or "wapiti" in North America.}}
| Invasive in South America, New Zealand, and Australia. Native to Europe, Western Asia, and North Africa.
|-
| ''[[Chromolaena odorata]]''
| Herb
| Bitter bush, camfhur grass, Christmas bush, common floss flower, devil weed, jack in the bush, Siam weed, triffid
| Invasive in tropical Asia, Africa, and the Pacific. Native to [[Neotropical realm|Neotropics]].
|-
| ''[[Cinara cupressi]]''
| Insect
| Cypress aphid
| Invasive worldwide. Native to Middle East.
|-
| ''[[Cinchona pubescens]]''
| Tree
| Quina, red cinchona
| Invasive in Hawaii, the Galapagos Islands, and Tahiti. Native to Central and South America.
|-
| ''[[Walking catfish|Clarias batrachus]]''
| Fish
| Clarias catfish, climbing perch, freshwater catfish, Thailand catfish, [[walking catfish]]
| Invasive in North America. Native to Southeast Asia.
|-
| ''[[Formosan subterranean termite|Coptotermes formosanus]]''
| Insect
| [[Formosan subterranean termite]], Formosan termite
| Invasive in South Africa, Hawaii, and the United States mainland. Native to southern Japan, Taiwan, and South China.
|-
| ''[[Chestnut blight|Cryphonectria parasitica]]''
| Fungus
| [[Chestnut blight]]
| Invasive in North America. Native to East and Southeast Asia.
|-
| ''[[Eurasian carp|Cyprinus carpio]]''
| Fish
| Common carp, [[Eurasian carp]], European carp, fancy carp, feral carp, German carp, grass carp, Japanese domesticated carp, king carp, koi, koi carp, leather carp, mirror carp, Oriental carp, scale carp, wild carp
| Invasive worldwide. Native to East Asia.
|-
| ''[[Zebra mussel|Dreissena polymorpha]]''
| Mollusc
| Eurasian zebra mussel, wandering mussel, [[zebra mussel]]
| Invasive in North America and Western Europe. Native to Eastern Europe.
|-
| ''[[Common coquí|Eleutherodactylus coqui]]''
| Amphibian
| Caribbean tree frog, [[common coquí]], coqui, Puerto Rican treefrog
| Invasive in Hawaii, Virgin Islands, Dominican Republic, and Florida. Native to Puerto Rico.
|-
| ''[[Chinese mitten crab|Eriocheir sinensis]]''
| Crustacean
| Big sluice crab, Chinese freshwater edible crab, [[Chinese mitten crab]], Chinese river crab, Shanghai hairy crab
| Invasive in Europe and North America. Native to East Asia.
|-
| ''[[Euglandina rosea]]''
| Mollusc
| Cannibal snail, rosy wolf snail
| Invasive in Indian and Pacific Ocean islands. Native to the southeastern United States.
|-
| ''[[Euphorbia esula]]''
| Herb
| Green spurge, leafy spurge, spurge, wolf's milk
| Invasive worldwide. Native to Europe and temperate Asia.
|-
| ''[[Cat|Felis catus]]''
| Mammal
| [[Cat]], domestic cat, [[feral cat]], house cat
| Invasive worldwide.
|-
| ''[[Mosquitofish|Gambusia affinis]]''
| Fish
| Gambezi, live-bearing tooth-carp, [[mosquitofish]], mosquito fish, western mosquitofish
| Invasive worldwide. Native to the fresh waters of the eastern and southern United States.
|-
| ''[[Hedychium gardnerianum]]''
| Herb
| Ginger lily, kahila garland-lily, kahili ginger, wild ginger
| Invasive in Hawaii and New Zealand. Native to Himalayas.
|-
| ''[[Hiptage benghalensis]]''
| Shrub
| Hiptage
| Invasive in Australian rainforests, Mauritius, and Réunion. Native to South Asia and Southeast Asia.
|-
| ''[[Imperata cylindrica]]''
| Grass
| Blady grass, cogon grass, Japanese bloodgrass, speargrass
| Invasive worldwide, including the southeastern United States. Native to tropical and subtropical Asia, Micronesia, Melanesia, Australia, Africa, and Southern Europe.
|-
| ''[[Lantana camara]]''
| Shrub
| Angel lips, big sage, blacksage, common lantana, flowered sage, largeleaf lantana, prickly lantana, Spanish flag, West Indian Lantana, white sage, wild sage
| Invasive worldwide.
|-
| ''[[Nile perch|Lates niloticus]]''
| Fish
| African snook, [[Nile perch]], Victoria perch
| Invasive worldwide. Contributed to the decline of [[haplochromine]]s in [[Lake Victoria]]. Native to Africa.
|-
| ''[[Leucaena leucocephala]]''
| Tree
| False koa, faux mimosa, faux-acacia, horse/wild tamarind, jumbie bean, lead tree, white leadtree, wild mimosa, wild tamarind
| Native to Central America, invasive throughout other tropical regions.
|-
| ''[[Ligustrum robustum]]''
| Shrub
| Bora-bora, Ceylon privét, Sri Lankan privet, tree privet
| Invasive in the [[Mascarene Islands]] (Mauritius and Réunion). Native to South Asia and Southeast Asia.
|-
| ''[[Argentine ant|Linepithema humile]]''
| Insect
| [[Argentine ant]]
| Invasive worldwide. Native to South America.
|-
| ''[[Lissachatina fulica]]'' ([[Synonym (taxonomy)|syn.]] ''Achatina fulica'')<ref>{{cite web |url=https://www.molluscabase.org/aphia.php?p=taxdetails&id=881469 |title=Lissachatina fulica (Bowdich, 1822) |website=MolluscaBase |access-date=15 December 2023}}</ref>{{efn|The ISSG lists it as ''Achatina fulica''.}}
| Mollusc
| African giant snail, giant African land snail, giant African snail
| Invasive in South Asia, Southeast Asia, East Asia, the Pacific, Indian Ocean islands, the West Indies, and the United States. Native to East Africa.
|-
| ''[[American bullfrog|Lithobates catesbeianus]]''{{efn|The ISSG booklet gives it as ''Rana catesbeiana''.}}
| Amphibian
| [[American bullfrog]], bullfrog, North American bullfrog
| Invasive in Central and South America, the Caribbean, Western Europe, and East Asia. Native to eastern North America.
|-
| ''[[Lymantria dispar]]''
| Insect
| Asian gypsy moth, Asian spongy moth, spongy moth
| Invasive worldwide. Native to East Asia.
|-
| ''[[Lythrum salicaria]]''
| Herb
| Purple loosestrife, purple lythrum, rainbow weed, spiked loosestrife
| Invasive worldwide. Native to Europe.
|-
| ''[[Crab-eating macaque|Macaca fascicularis]]''
| Mammal
| [[Crab-eating macaque]], cynomolgus monkey, long-tailed macaque
| Invasive in Mauritius, Palau ([[Angaur]] Island), Hong Kong, and parts of Indonesia ([[Tinjil]] Island and [[Western New Guinea|Papua]]). Native to Southeast Asia.
|-
| ''[[Melaleuca quinquenervia]]''
| Tree
| Broad-leaved paperbark tree, broad-leaved tea tree, five-veined paperbark tree, paper bark tree, paperbark tea tree, punk tree, white bottlebrush tree
| Invasive in Florida. Native to New Caledonia, Papua New Guinea, and coastal Eastern Australia.
|-
| ''[[Miconia calvescens]]''
| Tree
| Bush currant, purple plague, velvet tree
| Invasive in Pacific Islands, including Hawaii and Tahiti. Native to rainforests of tropical America.
|-
| ''[[Miconia crenata]]'' (syn. ''Clidemia hirta'')<ref name=crenata /><ref>{{cite web |url=https://www.worldfloraonline.org/taxon/wfo-0001080580 |title=Clidemia hirta (L.) D.Don |website=World Flora Online |access-date=16 December 2023}}</ref>{{efn|The ISSG lists it as ''Clidemia hirta''.}}
| Shrub
| Clidemia, faux vatouk, Koster's curse, soap bush, soapbush
| Invasive in Hawaii, Indian Ocean islands (Seychelles), peninsular Malaysia, and parts of Micronesia (Palau).
|-
| ''[[Largemouth bass|Micropterus salmoides]]''
| Fish
| American black bass, bass, black bass, green bass, green trout, [[largemouth bass]], largemouth black bass, northern largemouth bass, stormundet black bass
| Invasive worldwide. Native to the eastern United States.
|-
| ''[[Mikania micrantha]]''
| Vine
| American rope, bitter vine, Chinese creeper, climbing hemp vine, mile-a-minute weed
| Invasive in the Pacific. Native to Neotropics.
|-
| ''[[Mimosa pigra]]''
| Shrub
| Bashful plant, catclaw, catclaw mimosa, giant sensitive plant, giant trembling plant, mimosa
| Invasive in Southeast Asia and Australia. Rice crop pest. Native to South America.
|-
| ''[[Mnemiopsis|Mnemiopsis leidyi]]''
| Comb jelly
| American comb jelly, comb jelly, comb jellyfish, sea gooseberry, sea walnut, Venus' girdle, warty comb jelly
| Invasive in Southeast European waters, including the Black, Azov, Marmara, Aegean, and Caspian Seas. Native to temperate, subtropical estuaries along the Atlantic coast of North and South America.
|-
| ''[[House mouse|Mus musculus]]''
| Mammal
| [[House mouse]]{{efn|The ISSG list includes the names "field mouse" and "[[wood mouse]]", which are ''Apodemus sylvaticus''.}}
| Invasive worldwide. Native to South Asia.
|-
| ''[[Stoat|Mustela erminea]]''
| Mammal
| Beringian ermine, ermine, Eurasian ermine, Eurasian stoat, short-tailed weasel, [[stoat]]
| Invasive in New Zealand. Native to the temperate Northern Hemisphere.
|-
| ''[[Nutria|Myocastor coypus]]''
| Mammal
| Coypu, [[nutria]]
| Invasive in North America, Europe, and Asia. Native to South America.
|-
| ''[[Myrica faya]]'' (syn. ''Morella faya'')<ref>{{cite web |url=https://www.worldfloraonline.org/taxon/wfo-0001085103 |title=Myrica faya Aiton |website=World Flora Online |access-date=15 December 2023}}</ref><ref>{{cite web |url=https://www.worldfloraonline.org/taxon/wfo-0001249296 |title=Morella faya (Aiton) Wilbur |website=World Flora Online |access-date=15 December 2023}}</ref>{{efn|The ISSG lists it as ''Morella faya''. The ISSG booklet gives it as ''Myrica faya''.}}
| Shrub
| Candleberry myrtle, faya bayberry, fayatree, fire tree, firebush
| Invasive in Hawaii, New Zealand, and Australia. native to the Azores, Madeira Islands, and the Canary Islands.
|-
| ''[[Mediterranean mussel|Mytilus galloprovincialis]]''
| Mollusc
| Bay mussel, blue mussel, [[Mediterranean mussel]]
| Invasive worldwide. Native to the Mediterranean Coast and the Black Sea.
|-
| ''[[Rainbow trout|Oncorhynchus mykiss]]''
| Fish
| Baja California rainbow trout, coast angel trout, coast rainbow trout, coast range trout, hardhead, Kamchatka steelhead, Kamchatka trout, Kamloops, Kamloops trout, lord-fish, [[rainbow trout]], redband, redband trout, salmon trout, silver trout, steelhead, steelhead trout, summer salmon
| Invasive worldwide. Native to cold-water [[tributary|tributaries]] of the Pacific Ocean in Asia and North America.<ref name=Behnke2002-117>{{cite book |last=Behnke |first=Robert J. |others=Tomelleri, Joseph R. (illustrator) |title=Trout and Salmon of North America |publisher=The Free Press |location=New York |isbn=978-0-7432-2220-4 |year=2002 |page=117 |chapter=Rainbow and Redband Trout }}</ref>
|-
| ''[[Ophiostoma ulmi]] sensu lato''{{efn|"Sensu lato" means "in the broad sense".}}
| Fungus
| [[Dutch elm disease]]
| Caused destructive pandemics in Europe and North America. Native to Asia.
|-
| ''[[Opuntia stricta]]''
| Shrub
| Common prickly pear, Araluen pear, Australian pest pear, common pest pear, erect prickly pear, gayndah pear, shell mound pricklypear, sour prickly pear, spiny pest pear
| Invasive in South Africa and Australia. Native to Neotropics.
|-
| ''[[Mozambique tilapia|Oreochromis mossambicus]]''
| Fish
| Common tilapia, Java tilapia, kurper bream, Mozambique cichlid, Mozambique mouth-breeder, Mozambique mouthbrooder, [[Mozambique tilapia]]
| Invasive worldwide. Native to Southeast Africa.
|-
| ''[[European rabbit|Oryctolagus cuniculus]]''
| Mammal
| [[European rabbit]], wild rabbit
| Invasive in [[Rabbits in Australia|Australia]] and New Zealand. Native to Southwestern Europe.
|-
| ''[[Pheidole megacephala]]''
| Insect
| Big-headed ant, coastal brown ant{{efn|The ISSG list includes the name "brown house ant", which can be ''[[Doleromyrma darwiniana]]'' or ''Pheidole capensis''}}
| Invasive in Australia, New Zealand, and Florida. Native to Southern Africa.
|-
| ''[[Phytophthora cinnamomi]]''
| Pseudo-fungus
| Cinnamon fungus, green fruit rot, heart rot, phytophthora root rot, seedling blight, stem canker, wildflower dieback
| Invasive in Africa, Australia, Italy and North America.
|-
| ''[[Pinus pinaster]]''
| Tree
| Cluster pine, maritime pine
| Invasive in South Africa and New Zealand. Native to the Mediterranean Basin.
|-
| ''[[Plasmodium relictum]]''
| Protozoan
| Avian [[malaria]]
| Highly invasive in Hawaii; implicated in several bird extinctions
|-
| ''[[Platydemus manokwari]]''
| Flatworm
| New Guinea flatworm, snail-eating flatworm
| Invasive in Pacific islands. Native to New Guinea.
|-
| ''[[Pomacea canaliculata]]''
| Mollusc
| Apple snail, channeled apple snail, golden apple snail, golden kuhol, miracle snail
| Invasive in Southeast Asia and Hawaii. Rice crop pest. Native to South America.
|-
| ''[[Pontederia crassipes]]'' (syn. ''Eichhornia crassipes'')<ref>{{cite web |url=https://www.worldfloraonline.org/taxon/wfo-0000501039 |title=Pontederia crassipes Mart. |website=World Flora Online |access-date=13 December 2023}}</ref>{{efn|The ISSG lists it as ''Eichhornia crassipes''.}}
| Aquatic plant
| Common water hyacinth, eichhornia, floating water hyacinth, water orchid
| Invasive worldwide. Native to South America.
|-
| ''[[Potamocorbula amurensis]]''
| Mollusc
| Amur River clam, Amur River corbula, Asian bivalve, Asian clam, brackish-water corbula, Chinese clam, marine clam
| Invasive in San Francisco Bay (United States). Native to coasts of China, Japan, Korea, and Siberia.
|-
| ''[[Prosopis glandulosa]]''
| Tree
| Honey mesquite, Texas mesquite
| Invasive in Africa and Australia. Native to [[Aridoamerica]].
|-
| ''[[Psidium cattleyanum]]''{{efn|The ISSG lists it as ''Psidium cattleianum''.}}
| Shrub
| Cattley guava, cherry guava, strawberry guava
| Highly invasive in Mauritius and Hawaii. Native to Brazil.
|-
| ''[[Pueraria montana]]'' var. ''lobata''
| Vine
| East Asian arrowroot, Japanese arrowroot, kudzu, kudzu vine
| Native to Southeast and East Asia. Invasive in several other parts of the world, especially the [[Kudzu in the United States|southeastern United States]].
|-
| ''[[Red-vented bulbul|Pycnonotus cafer]]''
| Bird
| [[Red-vented bulbul]]
| Invasive in many Pacific islands. Native to South and Southeast Asia.
|-
| ''[[Black rat|Rattus rattus]]''
| Mammal
| [[Black rat]], European house rat, roof rat, ship rat{{efn|The ISSG list includes the name "bush rat", which is various other species.}}
| Invasive worldwide; implicated in numerous mammalian, reptilian and bird extinctions. Native to Central Asia.
|-
| ''[[Reynoutria japonica]]'' (syns. ''Fallopia japonica'', ''Polygonum cuspidatum'')<ref>{{cite web |url=https://www.worldfloraonline.org/taxon/wfo-0000406106 |title=Reynoutria japonica Houtt. |website=World Flora Online |access-date=13 December 2023}}</ref>{{efn|The ISSG lists it as ''Polygonum cuspidatum''. The ISSG booklet gives it as ''Fallopia japonica''.}}
| Shrub
| Asian knotweed, crimson beauty, donkey rhubarb, fleeceflower, German sausage, Japanese bamboo, Japanese fleece flower, Japanese knotweed, Japanese polygonum, kontiki bamboo, Mexican bamboo, pea-shooter plant, reynoutria fleece flower, sally rhubarb
| Invasive in Europe, New Zealand, and North America. Native to Japan.
|-
| ''[[Cane toad|Rhinella marina]]''{{efn|The ISSG booklet gives it as ''Bufo marinus''.}}
| Amphibian
| Bufo toad, bullfrog, [[cane toad]], giant American toad, giant neotropical toad, giant toad, marine toad, Suriname toad
| Invasive in [[Cane toads in Australia|Australia]], Melanesia, the Pacific, Philippines, Taiwan, Florida, and the West Indies. Native to South America and Central America.
|-
| ''[[Rubus ellipticus]]''
| Shrub
| Asian wild raspberry, broad-leafed bramble, Ceylon blackberry, golden evergreen raspberry, Molucca berry, Molucca bramble, Molucca raspberry, robust blackberry, wild blackberry, wild raspberry, yellow Himalayan raspberry
| Invasive in Hawaii. Native to South Asia.
|-
| ''[[Brown trout|Salmo trutta]]''
| Fish
| Blacktail, brook trout, [[brown trout]], finnock, Galway sea trout, herling, lake trout, orange fin, Orkney sea trout, salmon trout, [[sea trout]], trout, whitling
| Invasive worldwide. Native to Europe, Central Asia, and the Atlas Mountains of Africa.
|-
| ''[[Salvinia molesta]]''{{efn|This replaced † ''[[rinderpest]] virus'' after that was eradicated in 2011.}}
| Aquatic plant
| Giant salvinia, kariba weed
| Invasive worldwide.
|-
| ''[[Schinus terebinthifolia]]''<ref>{{cite web |url=https://www.worldfloraonline.org/taxon/wfo-0000435152 |title=Schinus terebinthifolia Raddi |website=World Flora Online |access-date=15 December 2023}}</ref>{{efn|The ISSG lists it as ''Schinus terebinthifolius''.}}
| Tree
| Brazilian holly, Brazilian pepper, Brazilian pepper tree, Christmas berry, Florida holly, Mexican pepper
| Invasive in North America, Australia, the West Indies, Pacific Islands. Native to South America.
|-
| ''[[Eastern gray squirrel|Sciurus carolinensis]]''
| Mammal
| [[Eastern gray squirrel]], gray squirrel, grey squirrel
| Introduced to the British Isles, Italy, and South Africa. Native to eastern North America.
|-
| ''[[Red imported fire ant|Solenopsis invicta]]''
| Insect
| Red fire ant, [[red imported fire ant]], RIFA,
| Invasive in Australia, New Zealand, Southeast Asia, the Caribbean, and the [[Red imported fire ants in the United States|United States]]. Native to tropical South America.
|-
| ''[[Spathodea|Spathodea campanulata]]''
| Tree
| African tulip tree, fireball, flame of the forest, fountain tree, Indian cedar, Santo Domingo mahogany
| Invasive in Pacific Islands. Native to West Africa.
|-
| ''[[Sphagneticola trilobata]]''
| Herb
| Creeping ox-eye, Singapore daisy, trailing daisy, wedelia
| Invasive worldwide. Native to Central America.
|-
| ''[[Sporobolus anglicus]]'' (syn. ''Spartina anglica'')<ref>{{cite web |url=https://www.worldfloraonline.org/taxon/wfo-0001341446 |title=Sporobolus anglicus (C.E.Hubb.) P.M.Peterson & Saarela |website=World Flora Online |access-date=13 December 2023}}</ref>{{efn|The ISSG lists it as ''Spartina anglica''.}}
| Grass
| Common cord grass, cordgrass, rice cord grass, rice grass, [[spartina]], Townsend's grass
| Invasive in New Zealand.
|-
| ''[[Common starling|Sturnus vulgaris]]''
| Bird
| [[Common starling]], English starling, European starling
| Native to Eurasia. Invasive in North America, Australia, and New Zealand.
|-
| ''[[Wild boar|Sus scrofa]]''
| Mammal
| Eurasian wild pig, [[wild boar]]{{efn|The ISSG list equates it with "[[feral pig]]".}}
| Invasive worldwide. Native to North Africa, Asia, and Europe.
|-
| ''[[Tamarix ramosissima]]''
| Shrub
| Salt cedar, tamarisk
| Invasive in the western United States and northern Mexico. Native to Eurasia.
|-
| ''[[Red-eared slider|Trachemys scripta elegans]]''
| Reptile
| [[Red-eared slider]], red-eared slider terrapin, slider turtle
| Invasive worldwide. Native to southeastern North America.
|-
| ''[[Common brushtail possum|Trichosurus vulpecula]]''
| Mammal
| [[Common brushtail possum]]
| Invasive species in [[Invasive species in New Zealand|New Zealand]]. Native to Australia.
|-
| ''[[Khapra beetle|Trogoderma granarium]]''
| Insect
| Cabinet beetle, [[Khapra beetle]]
| Invasive worldwide. Native to South Asia.
|-
| ''[[Ulex europaeus]]''
| Shrub
| Gorse, Irish furze, whin
| Invasive in New Zealand and Hawaii. Native to Western Europe and parts of Asia.
|-
| ''[[Wakame|Undaria pinnatifida]]''
| Seaweed
| Apron-ribbon vegetable, Asian kelp, Japanese kelp, sea mustard, [[wakame]]
| Invasive in New Zealand, the United States, Western Europe, Argentina, Australia, and Mexico. Native to Japan.
|-
| ''[[Small Indian mongoose|Urva auropunctata]]'' (syn. ''Herpestes auropunctatus'')<ref>{{cite web |url=https://www.mammaldiversity.org/explore.html#genus=URVA&species=auropunctata&id=1006050 |title=Urva auropunctata (Hodgson, 1836) |website=ASM Mammal Diversity Database |publisher=American Society of Mammalogists |access-date=14 December 2023}}</ref>{{efn|The ISSG lists it as ''Herpestes javanicus'', which is now ''Urva javanica'' "[[Javan mongoose]]", but then mostly describes the "small Indian mongoose".}}
| Mammal
| [[Small Indian mongoose]]
| Invasive on the northeast coast of South America, Croatia, [[Amami Ōshima]], Fiji, Hawaii, and the West Indies; implicated in several mammal, bird and reptile extinctions. Native to South and Southeast Asia.
|-
| ''[[Vespula vulgaris]]''
| Insect
| Common wasp, common European yellowjacket, European Wasp
| Invasive in New Zealand, Australia, Chile, and Argentina. Native to the temperate Northern Hemisphere ([[Palearctic realm|Palearctic]]).
|-
| ''[[Red fox|Vulpes vulpes]]''
| Mammal
| [[Red fox]], [[silver fox (animal)|black or silver fox]] variation, [[cross fox]] variation
| Invasive in [[Red foxes in Australia|Australia]]. Native to the Northern Hemisphere.
|-
| ''[[Electric ant|Wasmannia auropunctata]]''
| Insect
| Cocoa tree-ant, [[electric ant]], little fire ant, little introduced fire ant, little red fire ant, small fire ant, West Indian stinging ant
| Invasive in the Pacific, the West Indies, and parts of Central Africa. Native to Central and South America.
|}
==Notes==
{{notelist}}
==References==
{{reflist}}
==External links==
*[https://www.inaturalist.org/projects/iucn-100-worst-invasive-species?tab=observations&subtab=map 100 of the World's Worst Invasive Alien Species's observations on the map - iNaturalist]
*[https://www.inaturalist.org/projects/iucn-100-worst-invasive-species?tab=species 100 of the World's Worst Invasive Alien Species List - iNaturalist]
[[Category:2013 works]]
[[Category:2013-related lists]]
[[Category:Lists of invasive species]]
[[Category:Lists of worsts]]