Brown recluse spiders, also known as fiddleback or violin spiders, are a species of venomous spiders that are commonly found in the United States.
These spiders are recognized by their dark, violin-shaped marking on their cephalothorax and their unique arrangement of six eyes instead of the usual eight in most spiders.
As with most spiders, brown recluses create webs for different purposes such as resting, hiding, or capturing prey.
However, their webs are not the typical orb-shaped structures that many people associate with spiders.
Instead, brown recluse spiders build irregular, rather unorganized webs in undisturbed locations like dark and sheltered areas.
Brown Recluse Spider Basics
Brown recluse spiders, also known as Loxosceles reclusa, are primarily found in the south, west, and midwest areas of the United States.
These states include Texas, Georgia, Kentucky, Ohio, Indiana, Illinois, Iowa, and Nebraska.
These spiders are commonly called violin spiders due to the distinct violin-shaped marking on their cephalothorax.
They have a unique eye pattern, with six eyes arranged in three pairs. Typically, brown recluse spiders prefer dark, sheltered areas such as:
- Under rocks
- In the bark of dead trees
- Attics
- Basements
- Cupboards
- Drawers
- Boxes
- Bedsheets
Brown recluse spiders exhibit several distinguishing features:
- 6-20 millimeters body length
- Long legs
- Triad arrangement of eyes
- Violin-shaped marking on cephalothorax
These spiders are known for their bite, which can cause local tissue injury known as dermo necrotic arachnidism.
They hunt their prey using the venom in their bite, rather than by jumping on them.
Brown recluse spiders have a slow development process influenced by nutrition and environmental conditions, maturing in about a year and living for an average of 2 to 4 years.
Habitat and Behavior
The brown recluse spider is known for its unique habitat preferences and behaviors.
In this section, we’ll explore where these spiders prefer to live, both indoors and outdoors.
Indoor Habitats
Brown recluse spiders can often be found in various parts of a home. They are typically attracted to:
- Basements: These spiders love dark, dry, and climate-controlled spaces.
- Attics: Brown recluse spiders gravitate towards undisturbed areas where they are less likely to encounter humans.
- Closets: Clothing provides an ideal hiding spot for spiders and their prey, insects.
Common indoor hiding spots include:
- Shoes
- Cracks and crevices in furniture
- Behind wall hangings
Being nocturnal hunters, they spend the day in their hiding areas and come out at night to hunt.
Outdoor Habitats: Do Brown Recluse Spiders Make Webs?
When residing outdoors, brown recluse spiders can be found in:
- Woodpiles
- Tree hollows
- Leaf litter
While these spiders do spin small webs, they are not used for catching prey. Instead, the web serves as a retreat and a place to rest during the day.
Signs and Prevention of Infestation
Brown recluse spiders are known for their elusive nature and preference for dark, secluded spaces. To effectively manage and prevent infestations, implementing an integrated pest management program is crucial.
These spiders tend to inhabit areas such as garages, cellars, storage boxes, tires, logs, and barns. They may also find their way into linens and undisturbed places within your home.
A key sign of a brown recluse infestation is their characteristic cephalothorax pattern. They have a distinct violin shape on this region, along with a unique eye pattern of 6 eyes in pairs.
Another sign to look for is their molted skins, which have an outstretched appearance, helping to confirm their presence.
To prevent infestations, focus on the following measures:
- Install sticky traps in dark areas, like garages and cellars, to catch wandering spiders
- Keep woodpiles, leaves, and other debris away from your home’s foundation
- Seal gaps around doors and windows to limit access
- Store items in sealed plastic containers to reduce potential hiding spots
Brown recluse spiders mainly construct their webs in hidden, undisturbed areas, as opposed to the large, elaborate webs made by orb weavers.
They lay their eggs in these secluded locations, averaging 1-2 egg masses per year.
Brown Recluse Spider Bites
Symptoms
Brown recluse spider bites can cause a range of symptoms in humans. Some common symptoms include:
- Pain or redness at the site of the bite
- Chills
- Fever
- Dizziness
- Vomiting
The spider’s venom can also cause a venomous bite, which can result in a scar or more severe reactions.
Treatment
If bitten by a brown recluse spider, it is important to seek medical attention. Treatment options often include:
- Cleaning the bite area with soap and water
- Applying a topical antibiotic
- Taking over-the-counter pain relievers
- Following doctor’s recommendations
Note: To help prevent brown recluse spider bites, it is essential to follow label directions when using residual pesticides and dust pesticides in the home.
Conclusion
In conclusion, brown recluse spiders, characterized by their violin-shaped markings and unique eye arrangement, are a notable species in the U.S.
While they do spin webs, these are primarily for resting and not for prey capture. Recognizing their habitats and behaviors can aid in preventing unwanted encounters.
Their bites, although rare, can lead to severe symptoms, making awareness and prevention crucial.
By understanding their nature and taking preventive measures, we can coexist safely with these intriguing arachnids.
4 Comments. Leave new
Wow! got an answer in 5 minutes from :
http://bugguide.net/node/view/378825
A harmless male Kukulcania sp.
Kukulcania are a neat group of spiders. Check them out here.
Hi! I live in Kansas where there is a ton of brown recluses. I have learned a lot about them and catch them all the time with drinking glasses. They cannot crawl up glass while most spiders can. I use that as my number one way to identify them. Also they only have six eyes. So I catch them, put a board under the glass and then carefully flip it over, if they can’t crawl up the glass, they get flushed down the toliet straight to the sewer followed by another flush for good measure. I make sure to flush before throwing them in there so they dont have a chance to crawl out first before being sucked down the drain which happened one time.
This picture is a female. I have caught only a few females since they don’t travel far from their nest which is in hidden dark corners while the males travel around at night to find the females to mate.
Anyways, I could go on and on about them but what is interesting is that I have had a female trapped in a upside down small glass for weeks at a time because I was not brave enough to flip the glass and afraid she would get away since they are very fast in warm climates. I thought I could starve her out but later I read that it can take six months. Anyways, long story too late to be short, her abdomen color would vary at times from this white color to a darker color. I have not found the reason why. If anyone knows, please let me know! It is very interesting.
Hi! I live in Kansas where there is a ton of brown recluses. I have learned a lot about them and catch them all the time with drinking glasses. They cannot crawl up glass while most spiders can. I use that as my number one way to identify them. Also they only have six eyes. So I catch them, put a board under the glass and then carefully flip it over, if they can’t crawl up the glass, they get flushed down the toliet straight to the sewer followed by another flush for good measure. I make sure to flush before throwing them in there so they dont have a chance to crawl out first before being sucked down the drain which happened one time.
This picture is a female. I have caught only a few females since they don’t travel far from their nest which is in hidden dark corners while the males travel around at night to find the females to mate.
Anyways, I could go on and on about them but what is interesting is that I have had a female trapped in a upside down small glass for weeks at a time because I was not brave enough to flip the glass and afraid she would get away since they are very fast in warm climates. I thought I could starve her out but later I read that it can take six months. Anyways, long story too late to be short, her abdomen color would vary at times from this white color to a darker color. I have not found the reason why. If anyone knows, please let me know! It is very interesting.
Sorry for laughing so hard Jeff,hope your toe is better!