Squirrels digging in your yard is a common, albeit sometimes frustrating, occurrence. The primary reasons squirrels dig are to bury or retrieve nuts and other food items, to excavate for nesting materials or to create burrows for shelter, and sometimes simply out of curiosity or to find insects. Identifying squirrel damage can range from small, scattered holes to more significant disturbances, especially in garden beds.
Deciphering Squirrel Behavior: Why They Dig
Squirrels are industrious creatures, and their digging activities are deeply rooted in their natural squirrel behavior and survival instincts. Fathoming these actions helps us understand how to manage them.
The Art of Storing: Why Squirrels Bury Nuts
One of the most well-known causes of digging in garden by squirrels is their innate need to hoard food. This is a critical survival strategy, particularly for tree squirrels like the Eastern Gray Squirrel.
- Winter Preparation: As autumn approaches, squirrels begin an intensive period of gathering and storing food for the lean winter months. They collect nuts, seeds, acorns, and other readily available edibles.
- Scatter Hoarding vs. Larder Hoarding: Most common yard squirrels practice “scatter hoarding.” This means they bury individual food items in numerous, widely dispersed locations across their territory. This strategy is a clever way to avoid losing their entire cache to a single predator or competitor.
- Memory and Rediscovery: Squirrels possess remarkable spatial memory. They can recall the locations of many of their buried treasures, even under a blanket of snow. However, they don’t remember every single spot. This leads to the germination of many new plants from forgotten acorns and seeds – a vital ecological role!
- Retrieval: When food is scarce, squirrels will actively dig to retrieve their buried caches. This constant digging and re-digging can lead to the appearance of numerous small holes across your lawn and garden.
Home Sweet Home: Digging for Shelter and Nesting
Beyond food storage, squirrels dig for reasons related to their habitat and reproduction.
- Nesting Materials: During nesting season, squirrels may dig to find soft materials like dry grass, leaves, or moss to line their nests.
- Shelter and Burrows: While many squirrel species prefer to nest in tree cavities or build dreys (leaf nests) high in trees, some ground squirrels do excavate burrows. These burrows serve as protection from predators, extreme weather, and as safe spaces for raising young. If you have a species of ground squirrel in your area, their digging might be more extensive and create larger holes.
- Cooling Off: On hot summer days, squirrels may dig shallow depressions in cooler soil, often in shady areas, to lie in and regulate their body temperature.
Other Causes of Digging
Sometimes, squirrel digging isn’t directly related to food or shelter.
- Insect Foraging: Squirrels are omnivorous and will happily snack on insects. If grubs, ants, or other soil-dwelling insects are abundant in your yard, squirrels might dig to find these protein-rich treats.
- Curiosity and Play: Young squirrels, especially, might engage in digging as a form of exploration and play.
Identifying Squirrel Damage: What to Look For
Distinguishing squirrel digging from that of other animals is crucial for effective squirrel pest control.
Patterns of Disturbance
- Small, Scattered Holes: The most common sign of tree squirrel digging is small, shallow holes, often no larger than a silver dollar, scattered across your lawn, flower beds, and vegetable gardens. These are typically where they’ve buried or retrieved nuts.
- Larger Holes and Tunnels: If you have ground squirrels, you might notice larger holes, often a few inches in diameter, with excavated soil piled nearby. These could be entrances to burrows.
- Disturbed Soil: Look for areas where the soil surface is disturbed, with loose dirt or debris scattered around.
- Damage to Bulbs and Plants: Squirrels are notorious for digging up flower bulbs (tulips, daffodils, crocuses) that they either mistake for nuts or actively seek out for their starchy content. They may also dig around the base of plants.
- Shredded Bark: While not directly related to digging, you might also observe shredded bark on trees, which squirrels do to access inner bark or to gather nesting material.
Differentiating from Other Pests
It’s important to know how to differentiate squirrel digging from that of other common yard pests.
| Animal | Typical Digging Pattern | Other Signs |
|---|---|---|
| Squirrels | Small, scattered holes; disturbed soil; bulb excavation | Shredded bark, chewed nuts, visible scurrying, nests in trees. |
| Moles | Raised tunnels just below the surface; mounds of soil | Pristine lawn with raised, winding tunnels; no visible holes unless tunnel collapses; often affects specific areas of lawn. |
| Voles | Shallow runways at surface level; small, neat holes | Gnawed bark at base of plants, eaten bulbs underground, distinctive surface-level paths through grass. |
| Grubs | Dead patches of grass that lift easily; digging for roots | Damaged roots; the lawn itself can be rolled up like a carpet; visible white grub larvae when digging. |
| Birds | Shallow scratching, often in loose soil or mulch | Peck marks, disturbed mulch, often looking for worms or seeds; less systematic than squirrel digging. |
| Dogs | Larger, more haphazard holes; often near fences or toys | Obvious signs of pet ownership, digging in familiar spots, toys buried or unearthed. |
Preventing Squirrels from Digging: Expert Tips & Tricks
Managing squirrel activity in lawn and garden requires a multi-pronged approach. The goal is to make your yard less appealing and accessible to them.
Making Your Yard Less Inviting
The most effective squirrel deterrents focus on removing attractants and creating barriers.
- Secure Your Trash: Ensure trash cans have tight-fitting lids. Squirrels are opportunistic scavengers and will raid unsecured bins.
- Clean Up Fallen Nuts and Fruit: Regularly sweep up acorns, walnuts, and fallen fruit from trees. These are prime attractants for squirrels.
- Bird Feeder Management: Bird feeders are a major draw.
- Squirrel-Proof Feeders: Invest in feeders designed with squirrel baffles or weight-activated mechanisms that close off access.
- Feeder Placement: Position feeders away from trees or structures that squirrels can use as launchpads. Hanging feeders can be more challenging for them.
- Cleanliness: Keep the area around feeders clean, as spilled seed is a significant attractant.
- Remove Water Sources: While less common for digging, access to water can encourage them to stay in the area. Ensure no leaky faucets or standing water sources are readily available.
Creating Physical Barriers
Physical barriers are highly effective for protecting specific areas.
- Garden Bed Protection:
- Hardware Cloth or Chicken Wire: Lay down a layer of hardware cloth or chicken wire on top of newly planted bulbs or seeds. You can bury it a few inches deep or lay it on the surface and cover it with mulch. This makes it difficult for squirrels to dig through.
- Plastic Netting: Similar to wire, plastic netting can deter digging.
- Mulch: A thick layer of mulch can sometimes deter squirrels from digging in specific spots, but determined squirrels will still dig through it.
- Protecting Trees and Shrubs:
- Tree Wraps: Wrap the lower trunks of young trees with metal guards or chicken wire to prevent squirrels from climbing and potentially digging around their roots.
- Pruning: Trim branches that provide easy access from roofs or fences to your garden.
Natural Squirrel Deterrents
Many gardeners swear by natural deterrents, though their effectiveness can vary.
- Repellent Plants: Some believe that planting strong-smelling plants like marigolds, mint, garlic, and onions around the perimeter of gardens can deter squirrels.
- Capsaicin-Based Sprays: Squirrels dislike spicy flavors. Sprays made from hot peppers (capsaicin) can be applied to bulbs, plants, and areas where digging occurs. Reapply after rain.
- Coffee Grounds: Used coffee grounds, sprinkled around plants, are thought to deter squirrels due to their scent and texture.
- Predator Urine: Granules or sprays made from fox or coyote urine can signal the presence of predators and make squirrels feel unsafe.
When to Consider Professional Squirrel Pest Control
For severe infestations or persistent problems, you might need professional assistance.
- Extensive Damage: If squirrels are causing significant damage to structures, electrical wires, or a large portion of your garden, professional squirrel pest control services can offer humane and effective solutions.
- Ground Squirrel Burrows: Ground squirrel burrows can undermine foundations or create tripping hazards. Experts can safely address these issues.
- Humane Trapping and Relocation: Reputable wildlife removal services often use humane trapping methods and relocate squirrels to suitable habitats away from residential areas. It’s important to ensure they follow local regulations and ethical practices.
Squirrel Digging Holes: What to Do About Them
The immediate issue is often the holes themselves. Here’s how to address them and prevent future digging.
Repairing Dug-Up Areas
- Replant Bulbs: If bulbs have been unearthed, replant them as soon as possible in their original location or a protected area.
- Fill Holes: Fill any holes left by squirrels, especially if they pose a tripping hazard or could encourage further digging. Gently firm the soil.
- Seed or Sod Damaged Lawn: For significant lawn damage, you may need to reseed or lay sod to repair the affected areas.
Long-Term Prevention Strategies
The most effective way to stop squirrel digging holes is by implementing a consistent prevention strategy.
- Remove Food Sources: This is paramount. Eliminate easy access to food.
- Protect Vulnerable Plants: Use physical barriers like hardware cloth or netting for bulbs and young plants.
- Make Areas Unpleasant: Employ natural or commercial deterrents.
- Diversify Your Landscaping: Consider plants that squirrels are less likely to disturb.
- Be Persistent: Squirrels are persistent. Regular maintenance and vigilance are key to successful squirrel deterrence.
Common Yard Pests: Squirrels Among Them
While squirrels are often the culprits, it’s worth remembering they are just one of many common yard pests that can cause digging. Always confirm the pest before implementing a solution.
Understanding Different Digging Pests
- Grubs: These larval insects feed on grass roots, causing brown patches. The turf can be lifted easily. You might see birds or other animals digging for grubs.
- Moles: Moles create raised tunnels just under the surface, pushing up soil. They are primarily insectivores and don’t eat plants or bulbs directly, but their tunneling can damage roots.
- Voles: Voles create surface runways in grass and may dig shallow holes to access roots and bulbs. They are prolific breeders and can cause significant damage to gardens.
- Ants: Some ant species can cause small mounds of soil, but their digging is usually localized around their nests and not as widespread as squirrel activity.
Squirrel Activity in Lawn: A Seasonal Overview
Squirrel activity in lawn can fluctuate throughout the year.
- Spring: Squirrels are busy preparing nests and may dig for stored nuts from the previous fall. Young squirrels may be learning foraging skills.
- Summer: Activity might decrease slightly during the hottest months, but they still forage. Insect foraging can increase digging.
- Autumn: This is peak activity season. Squirrels are intensely focused on gathering and burying food for winter. This is when you’ll see the most digging.
- Winter: While less visible, squirrels will still dig to retrieve buried food, especially during milder periods.
Frequently Asked Questions (FAQ)
Q1: Will squirrels eat my plants?
A1: Squirrels may nibble on some plants, especially young seedlings or flower buds, but their primary digging damage is usually to bulbs, seeds, and roots when burying or retrieving food.
Q2: How can I humanely deter squirrels from my yard?
A2: Focus on removing attractants like fallen nuts and securing trash cans. Use squirrel-proof bird feeders and consider physical barriers like hardware cloth for garden beds. Natural deterrents like spicy sprays can also be effective.
Q3: Why are squirrels digging up my flower bulbs?
A3: Squirrels are attracted to the starchy bulbs, often mistaking them for nuts. They dig them up to eat or to bury them for later.
Q4: Are there any sprays that will stop squirrels from digging?
A4: Yes, capsaicin-based sprays (made from hot peppers) can deter squirrels. You can purchase commercial products or make your own. Reapplication is necessary, especially after rain.
Q5: How do I differentiate squirrel digging from mole or vole damage?
A5: Squirrels leave small, scattered holes and disturbed soil, often focused on burying/retrieving food or digging up bulbs. Moles create raised tunnels and mounds. Voles create surface runways and small, neat holes.
By observing their patterns and implementing these expert tips, you can effectively manage squirrel activity in lawn and garden, reducing the frustration of unwanted digging while coexisting with these energetic creatures.