Another one is trade in exotic animals. There are countries that ship massive numbers of animals for the pet trade, yet the animals are not bred there, or even naturally present there.
Of course if you want ring-neck parakeets or Indian Mynahs you are very welcome to them here, where they are a massive problem, though the Mynah bird has solved one issue, it is about the only thing that likes a ground cricket appropriately named the Parktown prawn.