When you notice a series of raised ridges disrupting the surface of your lawn, the immediate question is rarely about the ecosystem; it is usually about the damage. To effectively address the destruction caused by these subterranean landscapers, one must first understand the driving force behind their relentless activity: their diet. What do ground moles eat is the foundational question that dictates their behavior, their preferred habitats, and ultimately, the strategy required to manage their presence.
The Insectivore's Menu
Contrary to the assumptions of many homeowners, ground moles are not vegetarians. They are specialized carnivores, driven by a high metabolic rate that requires them to consume massive quantities of food daily. An adult mole can eat up to 70% to 100% of its body weight in a single day. Their primary target is living prey, and their entire physiology is engineered for this lifestyle. Their saliva contains a paralyzing toxin that allows them to store live prey underground for later consumption, essentially creating a personal larder. Understanding this carnivorous preference is the first step in differentiating mole activity from other garden pests like gophers or voles.
Primary Food Sources
The vast majority of a mole's diet consists of soil-dwelling invertebrates. As they tunnel through the earth, they create temporary pockets of air around their prey, which disorients the insects and worms. The moles then patrol these tunnels, using their sensitive touch receptors to locate and consume these immobilized creatures. The menu is varied but specific, focused on protein-rich sources that provide the energy required for their constant digging.
Earthworms: This is the absolute staple of the mole diet. They consume earthworms in staggering amounts, often paralyzing them and storing them in special chambers within their tunnels.
Grubs: Lawn grubs, particularly those of Japanese beetles and June bugs, are a high-fat, high-protein delicacy that moles actively seek out.
Insect Larvae: The larvae of various beetles, flies, and other insects found in the soil are a common and nutritious snack.
Spider and Centipedes: While not the main course, these arthropods are frequently included in their varied diet.
The Impact on Your Landscape
The reason moles create those distinctive volcano-shaped mounds and raised ridges is directly tied to their eating habits. They do not eat plant roots or bulbs; however, the tunnels they create while hunting for worms and grubs can sever roots. This secondary damage manifests as patches of dead or wilting grass. Furthermore, the presence of moles is often an indicator of a healthy soil ecosystem, as they require a robust population of earthworms and grubs to sustain themselves. If you have an abundance of organic matter in your soil, you are inadvertently creating a five-star restaurant for these insectivores.
Grub Control: A Common Misconception
Many property owners assume that moles are present because they have a grub infestation. While moles will happily feast on grubs, the act of trapping or eliminating the moles rarely results in the long-term resolution of grub damage. The moles simply move on if the grub population drops, or they switch to other prey. Furthermore, if you use chemical grub control, it can take weeks to kill the grubs, during which time the moles may simply tunnel elsewhere in search of food, leaving your lawn damaged in the process.
Effective Management Strategies
Since the question "what do ground moles eat" points to their core survival needs, management should focus on disrupting their food supply rather than trying to poison them. Because they live almost entirely underground, traditional baiting methods are often ineffective and can be harmful to other wildlife. The most effective and humane approach involves reducing the moisture in the soil, as this drives earthworms and grubs deeper, away from the surface tunnels. Additionally, creating a physical barrier, such as a buried wire mesh, can prevent them from accessing specific areas like flower beds or vegetable gardens.
