Just read a good article about how unused worms (bait) are changing northern ecosystems. Nightcrawlers are not native and can change local flora and fauna by changing the bottom of the food chain. Be careful where you "dispose" of unused bait. The local wildlife will thank you.
Earthworms are invasive—and hurting insects—in much of North America (nationalgeographic.com)
Earthworms are invasive—and hurting insects—in much of North America (nationalgeographic.com)