Hobo spiders and wolf spiders are two common arachnid species that often get confused due to their similar appearance. Both can be found in North America, with wolf spiders being more widespread across the continent, while hobo spiders are primarily found in the Pacific Northwest region. Understanding the differences between these two species is essential, especially for those living in areas where they frequently coexist.
Wolf spiders are larger, ranging from 1/2 inch to 2 inches in length, with a hairy appearance and brown to gray coloring. On the other hand, hobo spiders usually have a slightly smaller size and display some distinct markings on their abdomen. Notably, wolf spiders are free-roaming hunters, while hobo spiders construct funnel-shaped webs to trap their prey.
Despite their somewhat fearsome appearance, neither of these spider species is truly dangerous to humans. Wolf spider bites, though possible if mishandled, are generally non-poisonous and cause mild discomfort. Although there has been some controversy about hobo spider venom, recent research indicates that the venom’s toxicity is minimal and does not pose a significant threat to humans.
Identifying Hobo Spiders and Wolf Spiders
Physical Appearance and Markings
Hobo Spiders:
- Chevron-shaped markings on the abdomen
- Less hairy compared to wolf spiders
Wolf Spiders:
- Hairy appearance
- Various markings or lines on the body
Color and Size
Comparing color and size:
Spider | Color | Size |
---|---|---|
Hobo Spider | Brown | 7-14 mm |
Wolf Spider | Brown/Gray | 13-50 mm |
Eyesight
One key difference between hobo spiders and wolf spiders is the arrangement of their eyes.
Hobo Spiders:
- 8 eyes in two nearly straight rows
Wolf Spiders:
- 8 eyes in three rows (4-2-2 arrangement)
Examples
Comparison Table
Feature/Characteristic | Hobo Spider | Wolf Spider |
---|---|---|
Markings | Chevron | Various lines |
Hair | Less | More |
Size | 7-14 mm | 13-50 mm |
Eye Arrangement | 2 Rows | 3 Rows |
Environment | Indoors | Outdoors |
Danger to Humans | Controversial | Low |
Habitat and Behavior
Preferred Environments
Hobo spiders are primarily found in the Pacific Northwest region of North America. They prefer dark, moist areas and are most often found in basements, window wells, and around the ground level, as they are poor climbers.
On the other hand, wolf spiders are common throughout North America and can be found in grasslands, forests, and even in homes. They prefer dry environments and can be found under rocks, logs, and plant debris.
- Hobo spider environment preferences:
- Dark and moist areas
- Basements and window wells
- Wolf spider environment preferences:
- Dry environments
- Grassy areas, under rocks and logs
Hunting Styles
Hobo spiders are part of the agelenidae family and construct funnel-shaped webs near the ground level. They use these webs to catch their prey, waiting at the entrance of the funnel for an insect to get trapped.
Wolf spiders, belonging to the lycosidae family, do not rely on webs for hunting. They are active hunters that ambush their prey and sometimes chase it down. They are also nocturnal and can jump to capture insects.
- Hobo spiders:
- Funnel-shaped web for hunting
- Lies in wait for prey
- Wolf spiders:
- Active hunters
- Nocturnal and jumping predators
Web Weaving
Hobo spiders build non-sticky, funnel webs with a retreat at the back of the funnel. They are typically found outdoors in various habitats, including grass and holes.
Wolf spiders, however, do not spin webs. Instead, they create burrows to use as a hideaway when they’re not hunting. Some wolf spiders carry their large egg sacs with them and even provide care for their young by letting the spiderlings ride on their back until partially grown.
Feature | Hobo Spider | Wolf Spider |
---|---|---|
Web Weaving | Funnel webs | No webs |
Hunting Location | Near ground level | Various habitats |
Parental Care | No known care | Carry young on back |
In conclusion, hobo spiders and wolf spiders have some similarities and differences in their preferred environments, hunting styles, and web-weaving behavior. By understanding these distinctions, one can identify and appreciate these unique arachnids better.
Venom and Bites
Comparing Venom Potency
The venom of both hobo spiders and wolf spiders is not considered life-threatening to humans. However, there are differences in their venom potency:
- Hobo spider: The venom from a hobo spider can cause skin necrosis, but this is a rare occurrence.
- Wolf spider: The venom of a wolf spider is less potent and usually only causes mild pain and redness.
Bite Reactions
Here are the typical bite reactions from both spider species:
- Hobo spider:
- Initial pain
- Redness and swelling
- Possible skin necrosis (rare)
- Wolf spider:
- Pain and redness
- Localized swelling
- No skin necrosis
It’s essential to note individual reactions can vary due to factors such as an allergic response or the spider’s age and health. In any case, it’s crucial to seek medical attention if you’ve been bitten by either of these spiders.
Treatment
Immediate action is necessary once bitten by a hobo or wolf spider:
- Clean the wound with soap and water.
- Apply ice to reduce pain and swelling.
- Elevate the bitten area.
- Take over-the-counter pain relievers if needed.
For hobo spider bites, medical professionals may also recommend other treatments, such as a tetanus shot. In the case of an allergic reaction or severe pain, consult a healthcare professional right away.
Comparison Table
Feature | Hobo Spider | Wolf Spider |
---|---|---|
Venom Potency | Can cause skin necrosis (rare) | Less potent |
Bite Reaction | Pain, redness, swelling | Pain, redness, swelling |
Skin Necrosis | Possible (rare) | No |
Treatment | Clean, ice, elevate, pain relief | Clean, ice, elevate, pain relief |
Prevention and Control
Protection and Deterrents
To protect your home from hobo spiders and wolf spiders, focus on their habitat and habits. These spiders prefer dark, moist areas such as:
- Basements
- Window wells
- Cracks and crevices
Seal any exterior cracks and crevices to prevent spiders from entering your home^(4^). Install tight-fitting door sweeps at the base of all exterior doors^(5^). Change exterior lighting to sodium vapor bulbs to attract fewer insects, which will consequently reduce spiders’ food sources^(5^).
Removal Techniques
If you find hobo spiders or wolf spiders inside your home, try these removal techniques:
- Vacuum individual spiders
- Step on or smash spiders
- Catch and release spiders using a glass jar^(5^)
Using sticky traps can also help to capture invading spiders^(5^).
Hobo spider | Wolf spider |
---|---|
Agelenidae family | Lycosidae family |
Dark, moist environments | Hairy, often found outside |
Rarely found above ground level | Can climb surfaces, but usually ground dwellers |
More common in the U.S. | Worldwide distribution |
Both species have egg sacs carried by the mother. Hobo spiders are more commonly found indoors, while wolf spiders are usually found outside^(1^)^(4^). Wolf spiders are harmless and cause mild bites^(2^); hobo spiders are also considered mostly harmless but may cause painful bites in some cases.
7 Comments. Leave new
It would be easier to determine the family if the face, particularly the eyes, were more distinguishable, but I think this may be a Nursery Web Spider (Pisauridae). It looks a lot like Tinus peregrinus which ranges from southwestern USA, including Nevada, to northern Mexico and is commonly associated with water. K
http://www.flickr.com/photos/33119087@N02/3336286273/
http://bugguide.net/node/view/257437/bgpage
Thanks so much for your input Karl. I thought this might be a Nursery Web Spider, but the Nevada location did not really make sense.
Hi Daniel & Diane,
The Palm Desert spider found on the surface of the pool is actually a large species of “wolf spider” by the name Arctosa littoralis. This one is a female. That species is normally found in sandy areas and they often blend right in to their surroundings. Some are even completely white to match white sand. They aren’t normally associated with water (aside from living on beaches sometimes), so I think this one just fell in and was doing the best it could to stay above water. Most kinds of spider can use the water’s surface tension to stay afloat for a while, but if their belly gets stuck to the water surface for too long, they will eventually drown (their lungs are on the underside of their abdomen). They can go a pretty long time without oxygen, but I’m glad to hear she was rescued! =)
-Mandy
Thanks so much for the correction Mandy. I will make a correction to the posting.
Daniel
Hi Daniel & Diane,
The Palm Desert spider found on the surface of the pool is actually a large species of “wolf spider” by the name Arctosa littoralis. This one is a female. That species is normally found in sandy areas and they often blend right in to their surroundings. Some are even completely white to match white sand. They aren’t normally associated with water (aside from living on beaches sometimes), so I think this one just fell in and was doing the best it could to stay above water. Most kinds of spider can use the water’s surface tension to stay afloat for a while, but if their belly gets stuck to the water surface for too long, they will eventually drown (their lungs are on the underside of their abdomen). They can go a pretty long time without oxygen, but I’m glad to hear she was rescued! =)
-Mandy
I have a new victim in Qld Australia. who says she was bitten in her pool of salt water is this possible and what would it look like?she thinks it was a white tailed spider/
Without an image, it is difficult to speculate on what bit your friend.