100 of the World's Worst Invasive Alien Species
Species Type Common names Notes
Acacia mearnsii shrub Black wattle , Australian acacia Invasive worldwide . Native to Australia
Acridotheres tristis bird Common myna , Calcutta myna , house myna , Indian myna , martin triste , talking myna Invasive in Australia , Hawaii , and Fiji . Established and potentially invasive in parts of Europe . Native to South Asia
Aedes albopictus insect Asian tiger mosquito , forest day mosquito , tiger mosquito Spread via the international tire trade . Native to tropical Asia
Anopheles quadrimaculatus insect Common malaria mosquito Invasive in North America
Anoplolepis gracilipes insect Yellow crazy ant , crazy ant , gramang ant , long-legged ant , Maldive ant Invasive in Australia , Hawaii and Indian Ocean islands
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
Aphanomyces astaci protozoan Crayfish plague Invasive in Europe . Native to North America
Ardisia elliptica tree 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 Giant cane , arundo grass , bamboo reed , cane , cow cane , donax cane , giant reed , reedgrass , river cane , Spanish cane , Spanish reed , wild cane Invasive in California
Asterias amurensis starfish Northern Pacific seastar , flatbottom seastar , Japanese seastar , Japanese starfish , North Pacific seastar , purple-orange seastar Invasive in the southern coasts of Australia . Native to far north Pacific Ocean coasts
Banana bunchy top virus ( BBTV ) virus Banana bunchy top disease , BBTD , abaca bunchy top virus , BBTV , bunchy top , bunchy top virus Invasive worldwide
Batrachochytrium dendrobatidis fungus Bd , chytrid frog fungi , chytridiomycosis , frog chytrid fungus Invasive in Australia and Panama
Bemisia tabaci insect Cotton whitefly , sweet potato whitefly , sweetpotato whitefly Invasive worldwide
Boiga irregularis reptile Brown catsnake , brown tree snake , brown treesnake Invasive in Guam . Native to Wallacea , New Guinea , Melanesia , and northern and eastern Australia
Bufo marinus = Rhinella marina amphibian Cane toad , bufo toad , bullfrog , giant American toad , giant neotropical toad , giant toad , marine toad , Suriname toad Invasive in Australia , Melanesia , the Pacific , Philippines , Taiwan , and the West Indies . Native to South America and Central America
Capra hircus mammal Goat , feral 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 northern Africa
Caulerpa taxifolia alga Killer Alga ( e ) Invasive in the Mediterranean Sea . Native to the Indian Ocean
Cecropia peltata tree Faux-ricin , pumpwood , trumpet tree , snakewood 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
List of species
100 of the World's Worst Invasive Alien Species is a list of invasive species compiled by the Global Invasive Species Database in 2014. The IUCN Invasive Species Specialist Group (ISSG), which maintains the list, acknowledges that it is very difficult to identify 100 invasive species from around the world that really are 'worse' than any others.