The bumblebeetle is a sparrow-sized descendant of beetles that inhabits the Rainshadow Desert (southeastern Pangaea II). The wingcases of the bumblebeetle reduce to streamlined airfoils. Its body is covered in sensory hairs, specifically for detecting scent. The bumblebeetle has no mouth and practically no digestive system: the bumblebeetle spends only a day in its adult form. It has fat reserves for food, from the larval stage of its life, grimworms, that feed on ocean flish carcasses and on each other.
The bumblebeetle mates in its larval form and then spends its entire adult life pregnant and searching for flish carcasses, in which to release its young. After this it dies, also becoming food for its larvae. Most of its life, the bumblebeetle is a larva, which is called a grimworm. When a bumblebeetle emerges as an adult, it already carries its cargo of grimworms. Then it flies away to a flish carcass. With no other landmasses to break up storms, powerful hurricanes called "hypercanes" blow unlucky flish over the mountains into the desert, where the dry atmosphere kills them. When the bumblebeetle finds a dead or dying flish, its abdomen splits to release the grimworms and dies. The grimworms burrow into the flish and eat the rotting flesh. Male grimworms leave for other flish carcasses and mate with female grimworms. When the flish carcass is stripped of flesh, the grimworm females pupate and emerge as adult bumblebeetles. Thus all bumblebeetles are female. The bumblebeetle serves another role to the Rainshadow Desert ecology. The deathbottle plant can fertilize itself, but it can not spread its seeds. So it evolves silvery leaves that imitate a flish corpse. Bumblebeetles land on this leaf and fall into a seed chamber. Covered in adhesive seeds, the bumblebeetle deposits them far from the parent plant.