When does a nonnative species like the basilisk officially enter the category of "invasive"?

Answer

If it begins to cause ecological or economic harm after establishing a permanent foothold.

A nonnative species moves into the "invasive" category if, after establishing a foothold, it starts causing quantifiable ecological or economic harm, such as competing with native fauna.

When does a nonnative species like the basilisk officially enter the category of "invasive"?

#Videos

BASILISKS in FLORIDA and WE CAUGHT SOME? - YouTube

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