The early bird... (in this case, the American Robin) gets the worm (and in this case, my new "Common Earthworm"). Yes, it's another sneak peak at my upcoming Nature's Wonders release, "Worms and Grubs". Robins can hear earthworms moving underground, which helps them locate their prey. Research shows that they listen for the subtle sounds made by worms, even when they cannot see or smell them. The Common Earthworm is a large, reddish worm species thought to be native to Western Europe, and now widely distributed around the world. In some areas where it is an introduced species, some people consider it to be a significant pest for out-competing native worms. It is also called the ‘Canadian Nightcrawler’ or ‘Dew Worm’. It is relatively large, pinkish to reddish-brown in color, generally 110–200 mm (4.3–7.9 in) in length and about 7–10 mm (0.28–0.39 in) in diameter. It has around 120–170 segments. The body is cylindrical in the cross section, except for the broad, flattened posterior section. The head end is dark brown to reddish brown laterally while the dorsal pigmentation fades towards the back. The American Robin is widely distributed throughout North America, wintering from southern Canada to central Mexico and along the Pacific Coast. It frequents forests, woodlands, and gardens, breeding primarily where lawns and other short-grass areas are interspersed with shrubs and trees, such as residential areas, towns, farmyards, and parks.