Question

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5. What is the word for non-domesticated species of plants, animals, and other organisms?​

Answer 1

They are not quite wild, in the sense of living apart from humans in a "natural" state. Nor are they domesticated, in the sense of being tamed and put to specific purposes for the benefit of humans.

These animals could be described as opportunistic, and in some cases could be called commensal, but is there a more specific word than those?