Ground Squirrels in Yards, Slopes & Crawlspaces in Southern California

Ground Squirrels Around Homes – What They’re Actually Doing

Ground squirrels are built for life on and in the ground. Instead of nesting in trees and attics like tree squirrels, they carve out burrow systems in slopes, planters and open dirt around homes, businesses and parks.

A typical ground squirrel day around a SoCal property looks like:

• Emerging from burrow entrances on slopes, planters or edges of pavement.
• Feeding on grass, plants, seeds, crops and whatever is growing nearby.
• Perching on rocks, walls or equipment as lookouts for predators.
• Retreating back underground through multiple entrances when disturbed.

Over time, a small family of squirrels can build large underground networks that extend under fences, walkways, decks and retaining walls, changing how stable that soil really is.

Burrows & Signs of Ground Squirrels on Your Property

Most people spot the holes and mounds first. The animals themselves are quick – up, out, feeding, then back underground at the first sign of trouble.

Burrow Openings

• Round or oval holes, usually 3–4 inches across, in bare or lightly vegetated soil.
• Often located on slopes, embankments, planters and around hardscape edges.
• Multiple openings for the same tunnel system, not just one hole per squirrel.

Soil Disturbance & Mounds

• Loose dirt piles and fan-shaped spoil mounds near the openings.
• Undermined soil near walls, walkways and pads that feels soft underfoot.
• Plants, shrubs or groundcover collapsing as soil is pulled out from beneath roots.

Animal Activity

• Daytime sightings of squirrels sitting near burrows or on nearby rocks and walls.
• Trails and runways between burrow areas and food sources.
• Chewed vegetation, stripped plants and damaged landscaping.

Ground squirrel sign is different from gophers. Gophers usually leave plugged mounds and stay mostly underground. Ground squirrels leave open holes and are often seen above ground during the day.

How Ground Squirrel Burrow Systems Grow Over Time

Ground squirrels don’t just dig one tunnel and stop. Over time they create connected burrow systems with sleeping chambers, escape routes and food storage areas. On a hillside or large yard, this can spread farther than most people realize.

Typical Burrow Layout

• Multiple entrances on the slope face, sometimes several feet apart.
• Tunnels that follow the contour of the slope or structure.
• Side chambers used for nesting, food storage and resting.

Why Burrows Cluster Around Structures

• Retaining walls, slabs and foundations can provide cover and stability.
• Landscaped slopes give both dirt for digging and plants for food.
• Fence lines and property edges act like natural borders and travel routes.

When burrow systems intersect with crawlspaces, slab edges or old utility trenches, ground squirrels can end up sharing routes with rats, skunks, rattlesnakes and other animals.

Damage Ground Squirrels Cause to Slopes, Hardscape & Crawlspaces

The biggest ground squirrel problem is not teeth and claws. It’s soil movement. When enough dirt is pulled out from under something, that “something” stops having solid support.

Slopes & Erosion

• Burrows weaken slopes, making them more vulnerable to erosion and washouts.
• Heavy rain events can collapse tunnels and carry soil downslope.
• Landscaping meant to stabilize slopes loses its root support.

Hardscape & Structural Concerns

• Undermined walkways, patios and pads that begin to crack or settle.
• Voids forming under concrete steps, small slabs and equipment pads.
• Burrows connecting to crawlspace areas and foundation edges.

This is where ground squirrel control connects directly with crawlspace cleaning and exclusion and damage repair. Leaving burrows open under structures is like leaving the door unlocked for the next animal that wants to move in.

Ground Squirrels, Snakes & Coyotes – Who Follows the Tunnels

Ground squirrels don’t show up alone. The food and burrows they create can attract predators and opportunists that follow the same routes through the property.

Snakes

• Non-venomous snakes and rattlesnakes may hunt around burrow systems.
• Burrows and rock edges give snakes shade, cover and ambush spots.
• Busy ground squirrel colonies can turn a slope into a hunting ground.

Coyotes & Other Predators

• Coyotes and other predators follow the food – including ground squirrels.
• Predator traffic increases along fence lines, easements and access roads.
• This can increase coyote conflicts with pets and livestock.

Controlling ground squirrels is part of controlling the entire wildlife traffic pattern on a property. Ignoring a heavy colony often means more predators and more surprises later.

DIY Ground Squirrel Tricks vs. Professional Control

Ground squirrel problems are like gopher problems on steroids. Once the tunnels are established, quick DIY moves rarely erase the network that’s already there.

DIY Approaches That Usually Fall Short

• Random bait or grain: Risky without a plan and may not target the colony correctly.
• Smoke bombs or gas cartridges: Hard to use effectively in complex burrow systems.
• Filling holes with loose dirt: Squirrels dig back out or open new exits nearby.
• Flooding burrows with hoses: Can cause erosion and still miss side chambers.

Professional work focuses on assessment and strategy:

• Identifying active burrow systems and how they relate to structures.
• Using legal, targeted control methods for the specific site.
• Coordinating with gopher control and rodent control when multiple species are present.
• Planning follow-up and monitoring so the same problem doesn’t creep back.

That’s why the service side at /ground-squirrel-removal/ emphasizes inspection, long-term control and structural protection instead of one-time gadgets.

When It’s Time to Call a Ground Squirrel Control Specialist

Seeing one ground squirrel on a fence once in a while isn’t an emergency. A full colony and an active tunnel network is a different story.

Red Flags That Mean You Need Help

• Multiple open burrow holes in slopes, planters or along retaining walls.
• Soil beginning to sink, crack or feel soft near walks, pads or wall bases.
• Ground squirrels visible most days, with fresh dirt around entrances.
• Snakes or coyotes frequently seen hunting around the same area.
• Burrows clearly connecting to crawlspace openings or foundation edges.

A proper job usually includes:

• Inspection of the yard, slopes, hardscape and any connected structures.
• Written plan for ground squirrel control and monitoring.
• Recommendations for crawlspace cleaning or structural repair if burrows tie into the building.

Ground Squirrel Behavior & Damage FAQs

How are ground squirrels different from gophers?

Gophers are almost entirely underground and leave plugged mounds in lawns and planters. Ground squirrels leave open burrow holes in slopes, planters and bare ground and are often seen above ground during the day. Ground squirrel burrows also tend to be larger and more complex, and they can run under walls, pads and structures.

Can ground squirrels really damage retaining walls and patios?

Over time, yes. By pulling out soil and creating air pockets, ground squirrels weaken the support under walls, walkways and pads. That can lead to cracking, settling and erosion, especially when heavy rains or irrigation hit already loosened soil.

Do ground squirrels attract snakes and coyotes?

Ground squirrels are food for predators. Busy colonies naturally draw in snakes, coyotes and other animals that hunt around the same burrows and travel routes. Controlling the ground squirrels is often part of reducing predator traffic on the property.

Are ground squirrels dangerous to people or pets?

Ground squirrels are usually more of a property and parasite problem than an aggression problem, but any wild animal can bite if cornered or handled. Their burrows can also create tripping hazards and unstable ground. Pets that chase or dig at burrows may get scratched or exposed to fleas, ticks and other parasites.

Can I just fill all the holes and be done?

Filling openings with loose dirt or rocks usually doesn’t fix the underlying colony. Squirrels dig back out or open new exits along the same system. To actually solve the problem you need to deal with the colony itself, then address burrows and any structural or slope issues they created.