Calci Worm (Hermetia illucens) Calci Worms are the larval stage of the Black Soldier Fly and an ideal alternative for Wax Worms. They have a much better nutritional composition and have a longer shelf life. Again, these probably shouldn’t be used as the mainstay of an animal’s diet. But if you’re looking to add some variety to your animal’s diet these are a great choice. Favoured by Reptiles such as, Leopard Geckos, Bearded Dragons, Crested Gecko, Water Dragons, Tegus, Monitor Lizards & other types of Geckos. View our range of fresh packed calciworms below.