Homeowners and garden enthusiasts often find themselves contemplating the complex interactions within their soil, particularly when noticing mounds of earth and observing insects like ants traversing the landscape. A common question that arises in this context is whether moles, those enigmatic subterranean mammals, actively prey on ants as a primary food source. Understanding this predator-prey relationship is essential for effective pest management and for fostering a balanced ecosystem beneath our feet.
The Mole's Diet: Primarily Insectivorous
Moles are specialized carnivores, and their entire physiology is adapted for a life spent hunting in the dark. While they are often mistaken for rodents, they are actually insectivores, belonging to the order Eulipotyphla. Their diet is not based on plant material but consists almost exclusively of protein-rich invertebrates. The primary component of their menu includes earthworms, grubs, beetle larvae, and various soil-dwelling insects. This high-protein requirement is necessary to fuel their immense energy expenditure, as they can tunnel up to 18 feet in a single hour, constantly searching for their next meal.
Ants as a Food Source
Given that ants are abundant insects that live in complex colonies, it stands to reason that moles would encounter them frequently. The short answer is yes, moles will eat ants if they come across them, but ants are generally not their first choice. When moles dig through the soil in search of their preferred prey, such as the larvae of scarab beetles (grubs), they will inevitably disturb ant nests. In these instances, they will consume the ants and their larvae opportunistically. However, ants present a unique challenge due to their powerful mandibles and, in some species, their ability to spray formic acid, which can deter a mole from targeting them as a primary meal.
Mechanics of Hunting Underground
The hunting strategy of a mole is not based on sight but on touch and vibration. They possess incredibly sensitive snouts and whiskers that can detect the slightest movements of earthworms and grubs. When a mole tunnels through the soil, it creates distinct raised ridges or molehills. This tunneling behavior is the primary method by which they forage. As they push through the ground, they essentially "swim" through the soil, consuming any invertebrate that crosses their path. If an ant hill is in the way, the mole will simply tunnel around it or through it, eating the insects that flee the disturbance.
Comparison to Other Prey
When comparing the nutritional value of ants to other prey, moles clearly show a preference. Earthworms provide a high concentration of moisture and protein with minimal effort to extract. Grubs, which are the larvae of various beetles, are a calorie-dense feast that provides the fat necessary for the mole to survive cold soil temperatures. Ants, while a viable source of protein, are generally smaller and offer less sustenance per individual. Therefore, while a mole will eat ants to survive, it will actively seek out larger, more energy-rich prey to meet its daily caloric needs.
Implications for Pest Control
One of the most frequent concerns homeowners have is whether moles eating ants is beneficial for controlling an ant problem. The reality is complex. While a mole will consume ants present in the soil, it is unlikely to significantly reduce a thriving colony located in the yard above. Moles are solitary hunters with large territories, and their tunneling is random in search of food, not targeted extermination. Furthermore, the damage caused by mole tunneling—destroying plant roots and creating unsightly mounds—often outweighs the minor benefit of ant removal.
