Grub worms are the larvae of various scarab beetle species, including June bugs, Japanese beetles, dung beetles, and northern masked chafers. White grub worms are the most common type of grub worm found in lawns and gardens in North America. They are white with dark heads, soft-bodied, and have six legs. Green June beetle larvae are an exception, as they have no developed legs. Grub worms feed on plant roots and crowns, which can ruin lawns and attract birds, skunks, and raccoons that may dig up infested turf to dine on the grub worms. Most white grubs complete their development in one year, and the adult stages of white grubs are scarab beetles. When the grub worms reach the adult stage, they turn into beetles that emerge from the soil. The type of beetle species varies based on the type of grub worm.