Jumping worms, of the genus Amynthas, have now been spotted in more than half of US states and at least one Canadian province. Although the first documented observations of them in the US reach back to the 1930s, their arrival in many regions has been within just the past decades or even years. Researchers don’t know why, over the past decade and a half, these worms seem to be spreading so much farther and faster. They can transform the soil in one growing season. They also seem to be altering forests. In other words, we now have our own adapting to do. All above quoted from: What’s with these invasive "crazy" worms and why can’t we get rid of them?