Earwigs are misunderstood insects that are often mistaken for pests that consume wood. In reality, these nocturnal creatures typically feed on decaying plant material and dead insects. Though they may appear intimidating with their strong pinchers, they’re not known for causing extensive damage to wood or wooden structures around your home.
These insects, with their flat, reddish-brown bodies, can sometimes be found hiding under wood piles, boards, or other damp areas during the day. However, this shouldn’t be mistaken for an appetite for wood. In the evenings, earwigs become active and roam about, searching for food, such as garbage and various house plants. Their diet mainly consists of organic matter, keeping their focus away from your wooden furniture or structural components.
The Nature of Earwigs
Physical Features
Earwigs, also known as Forficula auricularia, are insects characterized by their unique physical features:
- Length: Approximately 5/8 inch long1
- Color: Reddish-brown body
- Wings: Very short
- Antennae: Medium length
- Forceps: Strong pinchers (cerci) on the tip of their abdomen1
Male earwigs have stout, strongly curved cerci, while females possess slender, straight pinchers1.
An Omnivore Diet
Earwigs are omnivores, feeding on a variety of materials such as:
- Soil organisms
- Fungi
- Algae
- Insect eggs and immature stages (e.g., fleas and aphids)2
- Snails and other slow creatures2
- Vegetation, especially when other sources of food are scarce
During the night, earwigs actively search for food3.
Life Cycle and Reproduction
Earwigs have a fascinating life cycle and reproduction process:
- Female earwigs lay 20 to 50 white or cream-colored eggs in a chamber within the upper 2 to 3 inches of soil4
- The female cares for the eggs and first stage of nymphs4
- Nymphs leave the nest and spend one season maturing4
Natural Predators
Earwigs are not only predators themselves, but also serve as prey for other animals:
- Birds: Many bird species are known to prey on earwigs
- Larger arthropods: Some larger insects and spiders also consume earwigs
Although earwigs may seem intimidating due to their forceps-like appendages, they do not pose significant harm to humans and typically hide during the day3.
Do Earwigs Eat Wood?
Decaying Wood as Habitat
Earwigs are known to inhabit a variety of places, including decaying wood. They prefer warm and moist environments to hide during the day and become active at night.
While earwigs primarily feed on decaying plant material and dead insects, their presence in decaying wood can create misconceptions about their dietary habits. However, they generally do not feed on healthy wood or cause structural damage to homes or furniture.
Earwigs’ preference for decaying wood:
- Provides shelter during day
- Offers a warm and moist habitat
Comparison of Earwigs’ Diet and Habitat
| Food Sources | Habitats |
|---|---|
| Decaying plant material | Decaying wood |
| Dead insects | Wet mops, flower pots, woodpiles, shrubberies |
To summarize, although earwigs may be found in decaying wood, they do not consume healthy wood. It is essential to distinguish between their habitat preferences and dietary choices to avoid misunderstandings about their impact on households and gardens.
Earwig Damage in Gardens
Affected Plants
Earwigs are known to damage different types of plants in gardens, including:
- Vegetables
- Seedlings
- Flowers
These pests feed mostly on decaying plant material and dead insects. However, in high numbers, they can sometimes cause damage to living plants as well.
How to Identify Earwig Damage
Earwig damage can often be confused with damage caused by other pests, such as slugs, cutworms, and rabbits. To differentiate earwig damage from other causes, pay attention to these points:
- Slime trail: While slugs leave a slime trail, earwigs do not.
- Feeding time: Earwigs typically hide during the day and come out to feed at night. Use a flashlight to check under plants at night to spot them.
Comparison of Earwig Damage and Slug Damage
| Factor | Earwig Damage | Slug Damage |
|---|---|---|
| Slime trail | No | Yes |
| Time of feeding | Night | Night |
| Plant preference | Seedlings, flowers, some vegetables | Seedlings, some vegetables |
Remember that earwigs can damage seedlings, vegetables, and flowers in your garden when they are present in large numbers. To reduce earwig damage, consider using traps hidden near shrubbery and ground cover plants.
Preventing and Controlling Earwig Infestations
Insect Barriers
One way to prevent earwigs is by using insect barriers. These can include:
- Sealing gaps around doors and windows
- Properly maintaining gutters and downspouts
- Installing window screens
Insect barriers help keep earwigs and other pests, such as centipedes, cockroaches, and boxelder bugs, out of your home.
Removing Habitats
To control earwig infestations, focus on eliminating their potential habitats. This involves:
- Cleaning up piles of leaves, wood, and debris around your home
- Maintaining a tidy garden to reduce hiding spots
- Keeping indoor areas, especially basements, dry and clutter-free
By removing these habitats, you can discourage earwigs from settling in your home.
Attracting Natural Predators
Another approach is to attract earwig predators to help control their population. Some examples of natural predators include:
- Birds
- Toads
- Centipedes
You can attract these predators by providing suitable environments, such as birdhouses and water sources, in your garden.
| Method | Pros | Cons |
|---|---|---|
| Insect Barriers | Effective in keeping pests out | Some maintenance required |
| Removing Habitats | Reduces hiding spots for earwigs | May require significant effort |
| Attracting Predators | Natural pest control with minimal effort | May also attract other pests to your yard |
Are Earwigs Dangerous?
Pinching Behaviour
Earwigs, also known as “pincher bugs,” are known for their characteristic pinchers (cerci) found at the tip of their abdomen. These pinchers can be used defensively when the earwig feels threatened. However, though they may be intimidating in appearance, they are generally not dangerous to humans. An earwig pinch might cause slight discomfort but typically does not result in significant pain or harm.
Preying on Insects
Earwigs are primarily scavengers that feed on dead insects and decaying plant material. In some cases, they may prey on other insects, but this behavior is less common. Comparatively, here are some features of these insects:
- Pinchers for defense and capturing prey
- Nocturnal lifestyle, hiding during the day
- Feeding on decaying matter and insects
Comparison of Earwig Behavior
| Behavior | Earwigs |
|---|---|
| Pinching | Can pinch in defense, but typically not harmful to humans |
| Preying | Occasionally prey on insects, but mainly feed on decaying plant material and dead insects |
In summary, while earwigs may appear intimidating due to their pinchers, they are generally not dangerous to humans or considered major pests. Their primary role in the ecosystem involves scavenging and breaking down decaying matter, and their occasional preying on other insects does not typically pose significant risks or problems.
Footnotes
