African Night Crawlers are native to the warm regions of West Africa, but now vermicomposters in tropic and sub-tropic climates all over the world are using them as composting and bait worms. Due to their voracious appetites and ability to quickly reproduce African nightcrawlers are quickly gaining popularity with vermicomposters. However, due to their warm-weather roots, ANCs are not able to tolerate the environmental conditions that red worms and European night crawlers can handle with ease. African Night Crawler is a distinctive mix of a grey and purple color and grows to over twice the size of red worms, often reaching over 8 inches. If you are familiar with red worms one of the things you will immediately notice about the ANC is how large and muscular it is compared to the redworm. You may also be surprised at the large size of their castings. African nightcrawlers are very desirable for vermicomposting, harvesting worm castings, and raising for bait worms. African nightcrawlers produce absolutely huge castings.