Which earthworms are native to southern Colorado region?

In southern Colorado, native earthworm species include the Eastern Red Wigglers (Lumbricus rubellus) and some species of the genus Diplocardia. These earthworms play a crucial role in soil health by aerating the soil and facilitating nutrient cycling. Unlike non-native species, such as the Nightcrawler (Lumbricus terrestris), native earthworms are adapted to the local environment and contribute to the region's unique ecosystem dynamics.