If they can't adapt to a natrual situation and die out, that is natrual selection for example the dinsaurs dying out during the ice age. However, that is not what we are talking about. What we are talking about is the destruction of habitat, all aspects of it because of the actions of human beings and that is not natural selection in the slightest degree. And, it doesn't matter if the wildlife is native or introduced it is all the same. We used to have passenger pigeons, millions and millions, so many that when the flocks flew it took hours from the begining flight to the end to pass. They were slaughtered, hunted at night in torch light, the roosts were set on fire at night killing them so the farmers could feed them to pigs, they were shot on the roost and all manner of vile human behavior, however, what finally ended the passenger pigeons was unregulated logging. Passenger pigeons had to be in huge flocks to survive, when the forests were decimated they had no plase to nest or roost so the logging coupled with the abominations that were carried out on them, they died out. That my friend was not natural selection, it was human stupidity
and natural selection had nothing to do with it.