The Brown Recluse Spider is a fascinating yet potentially dangerous creature that’s found in various parts of the United States.
Known for its distinctive appearance and venomous bite, understanding this spider is crucial for homeowners and outdoor enthusiasts alike.
With a violin-shaped marking on its cephalothorax and a unique six-eye pattern, the Brown Recluse distinguishes itself from other common spiders.
Found primarily in the central and southern regions of the United States, these spiders prefer dark and sheltered areas such as basements, attics, and woodpiles.
Some key features of the Brown Recluse include:
- Violin-shaped marking on the cephalothorax
- Six eyes arranged in pairs
- Tan to dark brown color
Despite their intimidating presence, Brown Recluse Spiders are generally shy and won’t bite unless threatened.
However, if bitten, it is essential to seek medical attention as their venom can cause serious tissue damage and other complications.
Learning to identify and prevent encounters with these spiders can help keep you and your loved ones safe.
Identifying Brown Recluse Spiders
Physical Features
The Brown Recluse Spider, also known as the fiddleback or violin spider, has several unique physical characteristics that set it apart from other spiders.
They are generally:
- Tan to dark brown in color
- Around 9 millimeters in body length
- Accompanied by long legs
Its overall appearance is quite distinct and allows for easy identification.
Eyes and Markings
Brown Recluse Spiders are unique in the spider world due to their special eye arrangement. They have:
- Six eyes, instead of the usual eight
- Arranged in three pairs
- Positioned in a semicircle, with one pair in front and the other two along the sides
Furthermore, they have a violin-shaped marking on their cephalothorax, with the neck pointing towards the abdomen.
Habitat and Distribution
These spiders are predominantly found in the South and Midwest of the United States.
The typical range of the Brown Recluse Spider extends from Texas to Ohio and from Kentucky to Kansas, as well as many other states in between, like:
- Oklahoma
- Louisiana
- Arkansas
- Missouri
- Mississippi
- Alabama
- Georgia
- Tennessee
- Indiana
- Illinois
- Iowa
- Nebraska
However, they are not usually found in states up North or out West. They prefer to live in sheltered, dark areas, both indoors and outdoors.
Common habitats include woodpiles, sheds, closets, and basements. In the outdoors, they are known to inhabit funnel weavers, a type of shelter created by certain species of spiders.
| Feature | Brown Recluse | Other Spiders |
|---|---|---|
| Eyes | Six eyes in three pairs | Eight eyes, usually in two rows |
| Markings | Distinct violin-shaped mark on cephalothorax | Varies |
| Range | South and Midwest states in the United States | Global |
| Habitats | Woodpiles, sheds, closets, basements, and funnel weavers in outdoors | Various |
Brown Recluse Spider Lifecycle
The Brown Recluse Spider, like all spiders, undergoes a fascinating lifecycle that takes it from a tiny egg to a mature adult.
Egg:
- The lifecycle begins when a female Brown Recluse lays her eggs. These eggs are typically encased in off-white silken sacs, which the female attaches to secluded, undisturbed places like cracks, crevices, or hidden corners.
- Each egg sac can contain anywhere from 40 to 50 eggs.
Spiderlings:
- After a few weeks, the eggs hatch into spiderlings. These tiny spiders are a miniature version of the adults but are much lighter in color.
- Spiderlings undergo several molts as they grow. With each molt, they shed their exoskeleton, allowing them to increase in size.
Juvenile Spiders:
- After several molts, the spiderlings transition into the juvenile stage. During this phase, they continue to grow and molt, gradually taking on the more recognizable features of the adult Brown Recluse, including the distinct violin-shaped marking.
- Juveniles are more active in exploring their surroundings and establishing their territories.
Adult Spiders:
- Once they reach adulthood, Brown Recluse Spiders have fully developed their characteristic appearance: tan to dark brown coloration, six eyes arranged in pairs, and the violin-shaped marking.
- Adult females will mate and then lay eggs, continuing the lifecycle. Males, after mating, have a shorter lifespan than females.
- The typical lifespan of a Brown Recluse Spider ranges from one to two years, though some can live longer under optimal conditions.
Mating:
- Mating usually occurs from February to September. After mating, females produce several egg sacs over a period of two to three months.
- It’s worth noting that female Brown Recluse Spiders can store sperm, allowing them to produce more than one egg sac from a single mating session.
Overwintering:
- In colder regions, Brown Recluse Spiders become less active during the winter months. They seek shelter in protected areas and reduce their metabolic rate, resuming activity when temperatures rise.
Brown Recluse Spider Bites
Symptoms
Brown Recluse Spider bites are usually characterized by an initial slight burning sensation, followed by redness and swelling.
As the venom starts affecting the tissue, a blister may develop, eventually leading to a necrotic ulcer.
Do note that this is not always the case, and many times the bite may simply heal on its own after a while.
Other symptoms may include:
- Pain
- Chills
- Fever
- Nausea
In some cases, especially with children, serious systemic reactions can occur.
Reaction to Venom
The Brown Recluse Spider’s venom can cause various reactions in the human body.
At the site of the bite, a necrotic lesion can form, which results in an open sore with a pale center and red edges.
This spider’s venom also affects red blood cells, leading to potential complications.
First Aid and Treatment
If bitten by a Brown Recluse Spider, immediate first aid measures should be taken:
- Clean the wound with soap and water
- Apply a cold pack to reduce swelling
- Keep the affected limb elevated
- Seek medical attention promptly
Medical treatment for Brown Recluse Spider bites may involve pain relievers and NSAIDs to reduce inflammation.
In serious cases, additional medications and wound care might be required.
Please note that Brown Recluse Spiders have a distinct violin-shaped marking and fine hairs on their body.
If you suspect a bite from one, consult a doctor for proper identification and treatment.
Preventing and Managing Infestations
Precautions at Home
To prevent brown recluse spider infestations, take these simple measures in and around your home:
- Keep areas clean and clutter-free, especially in attics, basements, garages, and closets.
- Seal any cracks and crevices in your home.
- Store items in airtight containers or plastic bags.
- Shake out shoes, clothing, and bedding before use.
- Wear gloves when handling items stored in dark, undisturbed areas.
Insecticides and Traps
Using insecticides and traps can help manage infestations. Here’s a comparison of their pros and cons:
Some insecticide sprays are specifically designed to target the brown recluse spider, while sticky traps can be placed strategically around your home to catch them.
Remember, if you find an infestation too difficult to handle, consult a professional pest control service.
Comparison to Other Spiders
Physical Differences
The Brown Recluse Spider has a distinct appearance compared to other spiders. Key features include:
- A dark brown violin shape on the cephalothorax
- Six eyes arranged in pairs with space separating the pairs, unlike most spiders, which have eight eyes
- Uniformly colored legs and body, ranging from dark brown to a light yellowish-brown
Another common spider, the tarantula, has noticeable physical differences:
- Brown to black in color
- Hairy appearance
- Over 3 inches long when fully grown
| Brown Recluse Spider | Tarantula | |
|---|---|---|
| Color | Dark brown to light yellow-brown | Brown to black |
| Eyes | 6 eyes in pairs | 8 eyes in two rows of four |
| Size | 5/8 inch (1.6 cm) | 3+ inches long |
Behavioral Differences
Brown Recluse Spiders and other spiders also exhibit different behaviors:
- Brown Recluse Spiders are typically found in dark, secluded spaces, whereas other spiders may have a wider range of habitats
- Brown Recluse Spiders lay 1-2 egg masses per year, which hatch into spiderlings after 24-36 days
- They usually avoid human interaction and only bite when threatened
In comparison, Tarantulas display the following behaviors:
- Most tarantulas are not aggressive and will only bite as a last resort
- Some tarantula species are more active during the day, while others hunt at night
- Tarantulas can have a lifespan of up to 25 years in captivity
In terms of capturing prey, both spiders typically use venom, but the effects of their bites differ:
- Brown Recluse Spiders have venom that can cause significant tissue damage in severe cases
- A Tarantula bite, while painful, is not usually dangerous to humans and is often compared to a bee sting for most species
Myths and Misconceptions about the Brown Recluse Spider
The Brown Recluse Spider, with its distinctive appearance and venomous bite, has been the subject of numerous myths and misconceptions over the years.
Myth: Brown Recluse Spiders are aggressive and frequently bite humans.
Truth: These spiders are reclusive by nature and typically only bite when threatened or trapped against the skin.
Myth: Brown Recluse Spiders are found all over the United States.
Truth: While they have a broad range, they are primarily found in the South and Midwest of the U.S. Many reported sightings in other areas are often misidentifications of other spider species.
Myth: The bite of a Brown Recluse always leads to severe necrosis and complications.
Truth: While their venom can cause tissue damage, not all bites result in severe reactions. Many bites heal without complications, though it’s always essential to seek medical attention if bitten.
Myth: Brown Recluse Spiders are large and easily noticeable.
Truth: These spiders are relatively small, with adults measuring about 9 millimeters in body length. Their violin-shaped marking is a more reliable identification feature.
Myth: All brown spiders with a violin-shaped marking are Brown Recluse Spiders.
Truth: There are several spider species with similar markings. Proper identification, considering other features like the unique six-eye arrangement, is crucial.
Conclusion
The Brown Recluse Spider, with its distinctive violin-shaped marking and unique six-eye arrangement, is a notable inhabitant of the central and southern United States.
While their preference for dark, secluded spaces often keeps them out of sight, it’s essential to recognize them due to the potential severity of their bites.
Though they are generally shy and avoid human interaction, caution is advised.
By understanding their habitat, appearance, and behavior, we can coexist safely with these fascinating arachnids.
10 Comments. Leave new
My wife and I were doing some research on Brown spider bites, and while this necrotic effect is sometimes seen with their bite, medical professionals haven’t been able to directly link the effect to the venom. They have, however, found large amounts of MRSA bacteria in them, which can cause large-scale infections and similar effects if left untreated.
The bacteria is common on many people’s skin, and under fingernails. The bite of the Browns spider is extremely itchy (as my wife can attest, as she’s been bitten). Some have theorized that instead of the bite causing this effect, people scratch at the itchy bite, pushing MRSA bacteria into the open bite holes, beginning an infection. Unknowing medical professionals treat it as a venomous bite rather than a bacterial infection, and it gets out of control, killing the affected flesh.
So, the first thing I would do if bitten: wash hands and under the fingernails, don’t scratch at the bite, and if it does begin to change color or grow larger (beyond a small red bite-bump), see your doctor and in addition to letting them know about the bite, insist that they check for bacterial infection as well.
Just a thought. These spiders might not be as dangerous as advertised! 🙂
I would definitely put stock in the idea that large scale infections are bacteria related and not just the result of venom.
Having grown up in an older home in north east Arkansas, brown recluses were just a way of life. Every since I can remember it was a common thing to find them in your shoes, crawling on your clothes in the closet, in bed with you, or just doing a little dance up your arm. My parents and I were fairly frequently bitten, but it never amounted to anything more than a very itchy welt. If it happened during sleep, generally the only evidence was a bite mark (varying degrees of size and redness). Interestingly, if it ever happened during sleep, there was rarely any itchiness. Wouldn’t have believed it was a recluse if it weren’t for the dead one under the sheet, poor little fellow must have been crushed.
My husband’s childhood home was also infested with them, FAR more than my home. In one day he caught over 30 of varying sizes on 3 different glue pads in his bathroom alone. Again, he was no doubt bitten several times and no severe necrosis was the result.
Not a spider I’m just thrilled to see, but I think we have a lot more to learn about them.
I would definitely put stock in the idea that large scale infections are bacteria related and not just the result of venom.
Having grown up in an older home in north east Arkansas, brown recluses were just a way of life. Every since I can remember it was a common thing to find them in your shoes, crawling on your clothes in the closet, in bed with you, or just doing a little dance up your arm. My parents and I were fairly frequently bitten, but it never amounted to anything more than a very itchy welt. If it happened during sleep, generally the only evidence was a bite mark (varying degrees of size and redness). Interestingly, if it ever happened during sleep, there was rarely any itchiness. Wouldn’t have believed it was a recluse if it weren’t for the dead one under the sheet, poor little fellow must have been crushed.
My husband’s childhood home was also infested with them, FAR more than my home. In one day he caught over 30 of varying sizes on 3 different glue pads in his bathroom alone. Again, he was no doubt bitten several times and no severe necrosis was the result.
Not a spider I’m just thrilled to see, but I think we have a lot more to learn about them.
Ok a Brown recluse Spider. AKA The Fiddle Back Spider
1. Has a fiddle on its back. Very easily seen and is unmistakably a fiddle
2. Are small and reclusive. You won’t see one crawling around the outside of your house
3. The Brown recluse Spider is NOT native to the southwest.
So, relax more than likely you will see a Wolf, Grass or Crevice spiders any where in Las Vegas. And due to the fact that they all look very much alike, they are all harmless.
Black Widows, are the other common spider in the Vegas Valley
Thanks so much for the nice explanation.
Ok a Brown recluse Spider. AKA The Fiddle Back Spider
1. Has a fiddle on its back. Very easily seen and is unmistakably a fiddle
2. Are small and reclusive. You won’t see one crawling around the outside of your house
3. The Brown recluse Spider is NOT native to the southwest.
So, relax more than likely you will see a Wolf, Grass or Crevice spiders any where in Las Vegas. And due to the fact that they all look very much alike, they are all harmless.
Black Widows, are the other common spider in the Vegas Valley
We live in OK. When we opened our pool this year it has lots of these strange looking creatures living in it. The back half or two thirds look like a long fish or goby, the front has six legs (three on each side) and its mouth has terrifying and effective pinchers.
The creature can actually crawl on land for a short time. Its color makes it look like a native fish…difficult to see in the water. Can you tell me what this is?
Thanks
We live in OK. When we opened our pool this year it has lots of these strange looking creatures living in it. The back half or two thirds look like a long fish or goby, the front has six legs (three on each side) and its mouth has terrifying and effective pinchers.
The creature can actually crawl on land for a short time. Its color makes it look like a native fish…difficult to see in the water. Can you tell me what this is?
Thanks
I live in Reno/Sun valley Nevada. And the other day in Sun valley I came across a big spider that had long tentacles and it was light brown and hair on it’s legs with a bit of a long body frame. The legs where very thin and it was hanging or sitting upside down on the ceiling of our screened in front porch. What kind of spider could this have been?
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