I still can't believe that mink were ever imported for fur. What were they thinking?! Greed, as usual, takes priority over common sense.
Hey, that's our mink! Give it back to us ;) In defense of both of our Countries, I don't think we collectively knew as much back then as we do now. It's really as simple as that. My question would be why didn't we begin to take more action back when we first began learning of the unprecedented toll these introductions were taking on our environment. Better late than never though. Speaking of what were we thinking deals, are you familiar with the Nutria we imported for fur?
I understand you have a big environmental mess on your hands thanks to our eastern bullfrog, Canadian goose, gray squirrel, and northern cottontail.
I have difficulty dispatching much of anything although I will suck up Asian lady beetles with a shop vac, cringe when I have to empty a rat zapper that I set, and do realize all feral cats I trap are humanely destroyed after animal control picks them up. That's the upper end of my limit currently although I do have personal friends who prefer native species who are like you and are capable of doing what needs to be done.
An incredible amount of research went into the re-introduction of those beavers. Bravo for them. Sure do wish we'd see the re-introduction of wolves around here and for that matter cougars.
Here's a list of the world's top 100 invasive species-