>> Rabbits in Australia might serve for a simple
>> illustration. They have been no end of trouble and they spelled the end
>> some species.
>But the rabbits are now at an end in Australia, are they not?
No. The calici virus seems to have failed after some patchy successes.
What's more (to pluck a source at random),
mentions the apparent darwinnowing of genetic resistance.
>those species can be reintroduced.
Not easily, if at all.
>Funny how nature is.
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