term:

Ferae Naturae

ferae naturae adj

[New Latin, literally, of a wild nature]
: wild by nature
: not usually tamed NOTE: Animals like wild ducks or bees are considered ferae naturae. At common law they cannot be claimed as one's property except under certain circumstances, as when captured.

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.