We should get used to these massive movement of species. Local habitats are changing rapidly, faster than the inhabitants can adapt. They'll have to move. On the current course the average global temperature will be much >7f warmer by 2100, that's a estimate that is really on the low end, and factors no positive feedback, which we are already seeing. Plants, animals and bugs are going to be moving and trying to find new habitat. So are humans, also changing places where we may have not been before, and their local flora/fauna.