In nature, no organism exists alone. Instead, various relationships are formed. For example, red velvet mites parasitize insects of the orders Orthoptera and Hemiptera. Locusts of the order Orthoptera and stink bugs of the order Hemiptera are agricultural pests. Therefore, these mites can be used for biological control. Walking along a forest trail, I saw this stink bug of the genus Elasmostethus, which prefers birch trees, with mites on its head, thorax, abdomen, and feet. Round and red, they looked like tiny lanterns. On its back was a small black herbivorous larva (leaf beetle larva). This little larva seemed to be hitchhiking! Was it ready for the stink bug to take it to a delicious plant?