Par contre s'ils peuvent creuser comme ce mec le dit, c'est fini pour nous RIP

Xenomorphs are the perfect invasive species.

They would infest the native life and out-compete every other life-form.

We essentially have very little ability to control even normal invasive species. It would be long after the fact before we could learn to counter the threat of this one.

Acidic blood really wouldn't be a significant threat on earth. However, it would remove xenos from our food chain altogether and potentially cause our ecosystem to collapse.

Xeno Eagles or other birds, etc.. could cause major issues with keeping anything contained. Not to mention Xenos could conceivably tunnel under any military quarantine or to escape the blast of a nuke.

Our only chance would be to release our own bio weapon that targets xenos specifically and tactically nuke every hive we can find.