What are species that don't belong in a particular area?

Answer 1

A species that "belongs" in a particular area, as you put it, is called a native species. I am sure that animals who find themselves in a non-natural habitat are called a non-native species, an invasive species, or introduced species. The introduction of some species into new environments can have devastating results - this is because the invasive species can eradicate necessary native species that are necessary to support a healthy ecosystem.

Answer 2

Invasive species, such as zebra mussels or cane toads, are examples of species that do not naturally belong in a particular area and can have detrimental effects on the local ecosystem by outcompeting native species or disrupting the natural balance. These species are typically introduced by human activities like accidental transport or intentional release.