Today you have the power to swap an alien for another. Mammal, plant, bird, Fish? Whatever you want, you have the power.
Tough question. Do you get rid of Grey squirrels, to give our delightful Reds a chance of recovery or do you get rid of an invasive plant like Japanese Knotweed? The choice is yours.
But what do you replace it with, think hard,
it may cause more problems than the one you ditched!