Species not originally from an area, that have been or introduced are called - species.

There are a few appliciable options, if u had a word bank to use I could probably be more accurate but:  trasnported, accidentaily no-native  

Explanation:

Species not originally from an area that have been trasnported or accidentaily  introduced  are called no-native species

Sorry If this isn't the exact answer your teacher wants-but it still works

a bird that nests only in a particular tree species.