List of introduced species

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 hope to 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 negative impact to new environments they reach, some can have positive impact, just for conservation purpose.

Australia has a huge range of introduced species, so sub-classifications are necessary:

Feral animals that cause the most public concern, and economic and ecological damage include:

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.

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.

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

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

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

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

Marine

Freshwater

Terrestrial

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

...
Wikipedia