“What are these worms?” asks Ruby about the group of yellow creatures with brown heads pictured below. “They are mainly in the bedroom but there are also some in the living room. I live in Katy, Texas. Thank you.” Well, we thank Ruby for the excellent photo she sent in. We can clearly see their dark yellow coloration, as well as the segmentation of their bodies, which has us concluding that these are mealworms. Mealworms are not actually worms at all, but larvae. Larvae are young insects that look a bit like worms. Their goal at this stage of life is to eat as much as possible so that they can store up energy for pupation: the stage that comes before adulthood. During pupation, they metamorphose into their adult form, like a caterpillar (which is a larva!) metamorphoses into a butterfly or moth.