The insect whose larval pits inspired the name “doodlebug” is the antlion. In North America, antlion larvae are called doodlebugs because their winding trails in loose sand look like lines drawn or doodled across the ground.
Many antlion larvae are ambush predators. They excavate funnel-shaped pits in dry, sandy soil and hide at the bottom with only their powerful jaws visible. When an ant or another small arthropod slips down the steep wall, the larva throws loose sand upward, triggering a miniature avalanche that prevents escape.
The name antlion refers to the larva’s usual prey and its predatory behavior, not to its appearance. Adult antlions are delicate, winged insects that can resemble dragonflies or damselflies, but they belong to the lacewing order Neuroptera.
Not every antlion species builds a pit. Some larvae hunt beneath leaf litter, in tree holes, or on rock surfaces. After the larval stage, an antlion pupates and emerges as a short-lived adult capable of flight.