We received a picture the other day from a reader requesting an identification. The image depicts white (or more like whitish) worm-like creatures that are quite plump, and the reader thought he might have found worms or caterpillars. In fact, we are quite confident the reader found grub worms, also called “lawn grubs” or simply “grubs.” Even though one of their common names is “grub worms,” they are not actually worms, but the larvae form of beetles – generally scarab beetles, but “grub” is a fairly loose term. Thus, they are not worms or caterpillars, but insect larva. Below we explain why we think our reader found grub worms.