A native species is one that is found in a certain ecosystem due to natural processes, such as natural distribution and evolution. The koala above, for example, is native to A… See more

Introduced species are those that occur in an area where they are not native, but were brought there through human influence — either purposefully or accidentally. A common mi… See more

An invasive species is one that is introduced into an ecosystem and thrives so well that it negatively affects native species. The USDAdefines invasive species as… See more

While an endemic species is limited to a particular range, a species that's found in a globally broad range, in a particular type of habitat all over the world, or which rapidly extends its … See more

While a native or introduced species is usually easy to categorize, that's not always the case. Sometimes it is nearly impossible to tell whether a species originated in an area or wa… See more