Identifying the Animal that Dug a Ground Hole
This section deals with actual den holes not divots or depressions in the soil.

If you are dealing with divots in the soil then click here.

Does the hole end or extend into a burrow?

What is the diameter of hole?

3 inches or less?

3 inch hole

Greater than 3 inches?

3 inches or less:

Chipmunk:

Holes tend to be cleanly dug and silver dollar sized. Note the shiny quarter to the left of the hole. Chipmunks are easily seen during the day. Photo by Stephen Vantassel.
chipmunk hole
Crayfish:

Crawfish can burrow 2 inch wide holes into the lawn. Lawns must be near water.
crayfish hole
13-Lined Ground Squirrel:

Very clean outside of hole. There may be another hole of similar size within 20 feet. They are easily seen on warm, sunny days.
13lgs hole
Kangaroo Rats:

Den entrance is 2-3 inches wide and 3-4 inches long. They prefer sandy, dry soil. Populations can get quite high, >30 per acre.
kangaroo rat hole
Rats, Norway:

Holes tend to be 2-3 inches wide and smooth from repeated use. Rats are secretive and rarely seen during the day. If you see them during daylight hours, it means you have a lot of rats on the premises. Drawing of their burrow system can be seen below. Photo at right shows a Norwary rat hole. Note the 6" ruler above.

rat hole
rat hole
Skunks:

Skunks will dig specific and individual holes in their quest for grubs and lawn insects. They will be systematic, moving from section to section each night.
skunk hole
Voles:

The Pine Vole has dime sized holes, often around the roots of plants. Voles are primarily nocturnal.
vole hole



Greater than 3 inches:

Badger:

These holes tend to be rather large (over 6 inches wide) and occur where pocket gophers and ground squirrels live. The photo on the left is a badger den. Note the volume of dirt excavated. The photo at the right is a badger left after hunting for food. Landowners will typically find a number of these holes in a field where badgers were searching for food. Badgers are nocturnal.
badger hole
Coyote:

Coyote dens tend to be difficult to find. Coyotes sometimes will live in a tree as the photo at the right shows.
coyote hole
Fox:

Foxes will often take over a den dug by another animal, such as a woodchuck. Bird and animal parts may be found around the entrance. They can also dig 4 inch wide holes in the grass. Photos courtesy of Rob Erickson of WCT Magazine.
fox hole









fox hole on green
Mountain Beaver:

Found only in the Pacific Northwest of the U.S. in coniferous forests. Holes average 6-8 inches across.
mountain beaver hole
Prairie Dog:

Usually found in colonies. Notice the soil around the hole is higher than the surrounding soil.
prairie dog hole
River Otter:

Typically near or in water. Click here for images.
otter hole
Skunk:

Often under sheds, porches and other covered and dark crawl spaces. Odor not always present.
skunk hole
Woodchuck:

Den doesn't always have two holes. But one hole will have dirt porch in front of it as shown in the photo at right. They avoid wet soils. Holes can average around 8" wide. Since woodchucks are active during daylight, their holes can often be distinguished from other creatures like badgers and skunks. It is common to see flies around the entrance of an active woodchuck burrow.
woodchuck hole
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