The Calci Worm (Hermetia illucens), also known as the Soldier Grub, is the larvae of the Black Soldier Fly. Loaded with calcium, they provide as a delicious treat for your reptile. In particular for Bearded Dragons. Reptiles that are either underweight, or possibly unwell, can benefit from these worms as a great health booster. They provide a much needed sustenance in one quick, easy meal.