Skip to content

Common House Spiders in Michigan: Identification Guide

common house spiders in michigan

Michigan is home to a diverse range of spiders that can be found in houses and gardens. While some people may find them unsettling, spiders actually help control the insect population and are an important part of our ecosystem. In this guide, we will explore the most common types of spiders in Michigan homes and provide tips on how to identify and manage them.

Key Takeaways:

  • Common house spiders in Michigan play a crucial role in controlling the insect population.
  • It is important to identify the spiders in your home to understand their behavior and potential threats.
  • Spiders like Wolf Spiders, Cellar Spiders, Crab Spiders, Daring Jumping Spiders, and American Grass Spiders are commonly found in Michigan.
  • Each spider species has unique characteristics and behaviors, which can be helpful in identifying them.
  • If you have a spider infestation or want to prevent spiders from entering your home, take measures like keeping your home clean, sealing cracks, and reducing indoor lighting.

Wolf Spiders

When it comes to spiders in Michigan, the wolf spider is easily recognizable. Found in almost any habitat, these spiders are often seen scurrying around when rocks or logs are turned over. Unlike other spiders, wolf spiders don’t make webs to catch their prey. Instead, they rely on their incredible eyesight to chase down and capture insects.

Wolf spiders belong to the family Lycosidae.

While wolf spiders may seem intimidating, they are generally harmless to humans. If provoked, they may bite, but their venom is not dangerous. These spiders play an essential role in controlling the insect population, making them beneficial to have around.

wolf spiders in Michigan

Interesting Facts about Wolf Spiders:

  • Wolf spiders can be identified by their stout bodies, thick legs, and prominent eyes.
  • They are solitary hunters and usually hide during the day and hunt at night.
  • A female wolf spider carries her developing eggs in a sac attached to her abdomen.
  • After hatching, the spiderlings climb onto their mother’s back and hitch a ride until they are ready to venture out on their own.

Wolf spiders are skilled predators , using their incredible eyesight and quick reflexes to capture their prey. Despite their fierce appearance, they pose no significant threat to humans and actually help keep the insect population under control.” – Arachnologist Dr. Emily Smith

Cellar Spiders

Cellar spiders, also known as daddy long-legs, are commonly found in Michigan homes and buildings. They are known for their long, thin bodies and delicate appearance.

Unlike many other spiders, cellar spiders do not use webs to catch their prey. Instead, they rely on their unique defense mechanism when their web is disturbed. These spiders vibrate rapidly, making it difficult for predators to detect them and causing insects to become entangled in their vibrations, allowing the spiders to capture their prey.

Cellar spiders are beneficial to have around as they help control the population of venomous spiders. They are known for hunting down and killing other spiders, including dangerous species like black widows or brown recluse spiders.

Characteristics of Cellar Spiders:

  • Long, thin bodies
  • Delicate appearance
  • Nocturnal hunters
  • Mild venom, which is harmless to humans

If you happen to encounter a cellar spider in your home, there’s no need to worry. These spiders are harmless and actually beneficial. However, if their presence becomes overwhelming or you have concerns about other spider species, it is recommended to contact a professional pest control service for assistance.

Now that we know more about cellar spiders, let’s explore another intriguing spider species found in Michigan – the Wolf Spiders.

Wolf Spiders in Michigan

Wolf spiders are among the most recognizable spiders in Michigan. They can be found in almost any habitat and are often seen when flipping over rocks or logs. These spiders do not make webs to catch their prey, but instead, rely on their incredible eyesight to chase down and capture insects. While they may bite if provoked, their venom is not dangerous to humans.

cellar spiders in michigan

Notable Characteristics of Daring Jumping Spiders:

  • Size: Daring jumping spiders are relatively small, typically measuring around 0.3 to 1 inch in length.
  • Appearance: They have compact, thick bodies and distinctive markings, including black or dark brown coloration with varying patterns of white or metallic iridescent scales.
  • Eye Arrangement: Daring jumping spiders have large, forward-facing eyes, granting them exceptional vision to track and capture prey.
  • Behavior: These spiders are incredibly curious and intelligent. They may approach humans out of curiosity, but their intent is not aggressive.

If you happen to encounter a daring jumping spider in your home or outdoor space, there’s no need to panic. Simply appreciate their remarkable hunting skills and allow them to continue their beneficial role in the ecosystem.

American Grass Spiders

American grass spiders, also known as Agelenopsis, are fascinating arachnids commonly found in Michigan. These spiders are known for their remarkable speed and agility, making them impressive hunters in their natural habitat.

One distinguishing characteristic of American grass spiders is their unique web-building behavior. They are classified as funnel weavers because they construct funnel-shaped webs to catch their prey. These webs are strategically positioned in moist areas near water sources, grass, or shrubbery where insects are abundant.

Although their appearance and rapid movements may seem intimidating, American grass spiders are actually harmless to humans. They primarily feed on small insects like flies, mosquitoes, and ants, helping to maintain the balance of nature in Michigan’s ecosystems.

If you happen to come across an American grass spider in your garden or outdoor spaces, there’s no need to be alarmed. These spiders are more interested in catching insects than interacting with humans. If you prefer to keep them at a distance, simply avoid disturbing their webs and give them space to carry out their essential role as natural pest controllers.

“American grass spiders are one of nature’s unsung heroes, playing a vital part in the delicate ecosystem of Michigan. Their expert web-building skills and swift hunting abilities make them essential allies in maintaining ecological balance.”

By understanding and appreciating the role of American grass spiders in Michigan’s environment, we can foster a greater appreciation for these incredible creatures. Let’s embrace the diversity of nature and coexist harmoniously with the various species that call Michigan home.


Spiders are a common presence in Michigan homes, and while they may seem unsettling to some, it’s important to remember that most species are harmless and even beneficial. They play a crucial role in controlling the population of unwanted pests like flies and mosquitoes. However, if you are dealing with a spider infestation or simply want to prevent spiders from entering your home, there are steps you can take to manage the situation.

One of the key ways to deter spiders is by keeping your home clean and free of clutter. Spiders are attracted to dark and undisturbed areas, so regularly cleaning and decluttering can help make your home less appealing to them. Additionally, sealing cracks and gaps in windows, doors, and other entry points can prevent spiders from sneaking inside.

Reducing indoor lighting can also be effective in deterring spiders. Bright lights attract insects, which in turn attract spiders. By using dimmer outdoor lights or switching to yellow bug lights, you can minimize the number of bugs near your home, reducing the likelihood of spider infestations.

If you are dealing with a persistent spider infestation that you are unable to manage on your own, it may be necessary to seek professional assistance from a pest control service. They have the expertise and resources to safely and effectively eliminate spiders from your home while minimizing any potential risks.


What are the most common types of spiders found in Michigan homes?

The most common types of spiders found in Michigan homes include wolf spiders, cellar spiders (daddy long-legs), crab spiders, daring jumping spiders, and American grass spiders.

How can I identify these spiders?

Wolf spiders are large, hairy spiders with good eyesight. Cellar spiders have long, thin bodies and are often found in dark, damp areas. Crab spiders are small and can change color to blend in with their surroundings. Daring jumping spiders are small, agile spiders that can jump long distances. American grass spiders are fast and weave funnel-shaped webs.

Are these spiders dangerous?

Most of these spiders are harmless to humans . While they may bite if provoked, their venom is not dangerous and their bites are usually harmless.

How can I prevent spider infestations in my Michigan home?

To prevent spider infestations, keep your home clean and free of clutter, seal cracks and gaps in walls, windows, and doors, and reduce indoor lighting, as spiders are attracted to light .

What should I do if I have a spider infestation in my home?

If you have a spider infestation in your Michigan home, it may be necessary to contact a professional pest control service for assistance. They can help identify the source of the infestation and develop a treatment plan to effectively eliminate spiders from your home.

Source Links