A complete list of introduced species for even quite small areas of the world would be dauntingly long. Humans have introduced more different species to new environments than any single document can record. This list is generally for established species with truly wild populations— not kept domestically, that have been seen numerous times, and have breeding populations. While most introduced species can cause a negative impact to new environments they reach, some can have a positive impact, just for conservation purpose.

Antarctica

Insects

Australia

Mammals

Birds

Fish

Reptiles

Amphibians

Arthropods

Molluscs

Echinoderms

Worms

Plants

Around 15% of Australia's flora is made up of introduced species. The following is a non-inclusive list of some of the more significant plant species.

British Isles and other European islands

Further information can be found at the GB non-native species secretariat, which has a free tool kit of resources on non-native species, including a photo gallery, ID sheets, risk assessments, projects database, case studies and resources for local action groups.

Mammals

Birds

Fish

Amphibians

Reptiles

Crustaceans

Insects

Butterflies and moths

Ants

Coleoptera (beetles)

Arachnids

Molluscs

Worms

Other Animals

Plants

Continental Europe

Mammals

Birds

Reptiles

Amphibians

Fish

Crustaceans

Insects

Molluscs

Other Animals

Plants

Hawaiian Islands

Mammals

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Birds

Primary source for this list is Robert L. Pyle and Peter Pyle, The Birds of the Hawaiian Islands unless otherwise stated

Reptiles

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Amphibians

<section begin=Hawaii_amphibians/>Primary source for this list is Nonindigenous Aquatic Species Database unless otherwise stated.

Fish

Primary source for this list is Nonindigenous Aquatic Species Database unless otherwise stated.

Arthropods

<section begin=Hawaii_arthropods/>* [Adoretus sinicus](https://bliptext.com/articles/adoretus-sinicus) (Chinese rose beetle)

Plants

Other species

New Zealand

Mammals

Birds

Reptiles

Amphibians

Fish

Insects

Arachnids

Other Animals

Plants

Up to 26,000 plants have been introduced into New Zealand. This list is a few of the more common and more invasive species.

United States and Canada

Mammals

Birds

Reptiles

Amphibians

Primary source for this list is Nonindigenous Aquatic Species Database unless otherwise stated.

Fish

Primary source for this list is Nonindigenous Aquatic Species Database unless otherwise stated.

Crustaceans

Primary source for this list is Nonindigenous Aquatic Species Database unless otherwise stated.

Mollusks

Marine Freshwater Terrestrial

Worms

Insects

Beetles and relatives

Crickets

Flies and allies

Termites

Sawflies

Aphids, whiteflies, and scale insects

Ants

Bees

Wasps

Moths and butterflies

Other insects

Arachnids

Jellyfishes

Other animals

Plants

This is a non-exhaustive list of some of the more significant plant species

Oomycetes

Central America, Caribbean islands and Mexico

Mammals

Birds

Reptiles

Amphibians

Fish

Insects

Arachnids

Worms

Crustaceans

Mollusks

South America

Mammals

Birds

Amphibians

Fish

Insects

Arachnids

Crustaceans

Mollusks

Asia excluding Japan

Mammals

Birds

Reptiles

Amphibians

Fish

Insects

Other arthropods

Molluscs

Other Animals

Japan

Mammals

Birds

Reptiles

Amphibians

Fish

Insects

Other Arthropods

Molluscs

Other Animals

Africa

Mammals

Birds

Reptiles

Amphibians

Fish

Crustaceans

Insects

Molluscs

Worms

Other Animals

Plants

Oceania and remote islands

Mammals

Birds

Reptiles

Amphibians

Insects

Molluscs

Worms