Regarding the niche comment. Look at any invasive species. Once it arrives within 10-20 years it can dominate the region it’s in. Evolution occurs the same way;

Regarding the niche comment. Look at any invasive species. Once it arrives within 10-20 years it can dominate the region it’s in. Evolution occurs the same way; once something mutates in a way with competitive advantage it expands. With insects this can happen rapidly (because they lay so many eggs). I don’t have it handy now, but we have examples of this in grasshoppers. Pesticide resistant insects are another example. Now, this assumes we don’t keep altering pesticides, but we do. If we keep trying to reduce insect populations we can, so I don’t think it’ll happen unless we allow it to happen. As for the other comment, my point is really we have records showing massive amount of insects all throughout history until the introduction of pesticides. Even during the Great Depression in the US we had massive swarms of insects. Once pesticides were introduced at scale we noticed a decline in recorded swarms until now we don’t even see them on windshields.