Posts Tagged ‘Hobo Spider


Spider Identification Needed (Update)

Unidentified Spider on an Iowa desktop (Trey Hyatt)

SwittersB received this email message seeking assistance on identifying the photographed spider. Any one have a timely suggestion? A Wolf Spider?

“Hello Sir

We live in a rural-ish house surrounded by farmland etc. We found this spider creeping along our stairs, and us being tremendously freaked out sprayed it with ant and spider killer. Upon being sprayed… this thing would charge 1-2 feet straight at you.. or anyone that would get close. I believe I found it to be a Hobo spider based on a picture on your website, or a member of the wolf or grass spider. I really have no idea. Could you confirm or point me in the right direction, please? I attached a few photos, if you wouldn’t mind taking a look.”

Trey Hyatt/Iowa

Identify This Spider for Trey Hyatt of Iowa

This is a response from Rod Crawford, an Arachnologist for UW:

“I am a specialist on spiders of the states of Washington and Alaska. I have never been to Iowa and do not know the spiders that live there visually.The photo showing the spider on the desk shows no significant details, being just about enough to indicate that it’s a spider, but no more.The closeup photo is a little better but also shows no species-ID characters, I can’t even see the eyes which are the first things one looks at in classifying a spider (color and “markings” mean zero). The shape of the carpaace resembles some members of the fishing-spider family. Definitely not a hobo spider or anything dangerous.To get a species ID you’d have to ship the actual specimen here to me in Seattle (or to one of the many arachnologists who are closer to you, like in Ohio or Wisconsin).

Finally – wouldn’t YOU try to defend yourself if some unprovoked assailant sprayed poison gas in your face?”

—Rod Crawford, Burke Museum, Seattle, USA <>

– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
             Check out the “Spider Myths Web Site”!
and find out why everything “everybody knows” about spiders is wrong!

Hmmm? “Unprovoked assailant”? 


Update from Trey Hyatt re another spider in the house and a picture (8/24/2012):

“I previously sent you a few pictures of a spider we killed in our house. Think it was up between a wolf / hobo of some sort and you had sent the pictures to a spider expert in washington. Since then, I’ve killed another one in the same spot.. possibly a tad smaller, but just as aggressive as the previous one. I’ve included a few pictures. I have no found anything on the internet that I’ve considered a perfect match other than the hobo spider possibly? Have you found anything else out?

Unknown spider in Iowa. Help ID (Trey Hyatt)


Spider In Your Shoe? Whamo!

My Sis-in-Law stuck her left foot in her shoe and whamo! The spider was apparently worse for wear despite the bites. And, as often happens, my sister-in-law was certain it was a ‘brown recluse‘. She hasn’t traveled to the South lately. It is unlikely she has handled any transported materials that could have transported a ‘brown recluse spider’ into her farm house near Newberg, Oregon. Regardless of what kind of spider, the bites caused considerable swelling and pain. The bad juju was just starting to subside. SwittersB


The United States has five groups of spiders that can cause serious injury. The black widow and yellow sac spider are found throughout the country, although the latter’s range has yet to be mapped precisely. The hobo spider has expanded its range in the Pacific Northwest, while the brown recluse is found in the South and lower Midwest. Other recluses are found in the Southwest. Are there Brown Recluses in the PacNW? People seem convinced. (Legend: Purple, black widow; yellow, yellow sac; red, hobo spider; green, brown recluse; blue, other recluses). Spiders in General…pics

Map by Greg Foley



Brown Recluse Spider Bites Dangerous


It’s springtime & cleanup is going on. Be careful where you put
Your hands. They like dark spaces & woodpiles.  Also areas in the attic.

This guy was bitten by a Brown Recluse spider.

Brown Recluse Spider Bite Day 3

The following illustrates the progression of a brown recluse spider bite.
The affected skin actually dies on his body!
Some of the pictures towards the end are pretty nasty, but take a look at the last one – it is a picture of the spider itself.

Day 6

The Brown Recluse Spider is one of the most dangerous spider that we have in the USA

A person can die from it’s bite. We all should know what the Spider looks like……

The Dangerous Brown Recluse Spider

The name “brown recluse” spider correctly refers only to the midwest species; additional species are known by common names such as the desert recluse, the Arizona recluse, etc. Unfortunately, non-arachnologists incorrectly lump them all under the “brown recluse” moniker. This is a potentially incorrect extrapolation because only the brown recluse has been intensively studied. All recluse species are probably capable of inflicting necrotizing bites, however, there may be behavioral and toxicological differences among the various species.

Two other spiders that have the potential to produce necrotizing wounds, though much less well-documented than the brown recluse, are the hobo spider and the yellow sac spider. The hobo spider (Tegenaria agrestis) may be found in the Pacific Northwest as far east as Montana and south into Oregon and Utah. The two yellow sac species (Cheiracanthium spp.) are found all over the United States, but probably only produce minor necrotic wounds. SPIDERS Spider Bites Gross


NW Spiders Hanging Around

OREGON Spider (swittersb)


Lurking about the yard these two were about the size of a M&M Peanut on steroids. NW Spiders    Hobo Spider

Northwestern brown spider or the hobo spider                     HOBO Not Recluse

“The northwestern brown spider or hobo spider (Tegenaria agretis) is well known in Oregon and Washington and is also quite common in Utah. Spider bites by this spider are becoming recognized more often in California, which may be due to the fact that the spider is becoming better known. The hobo spider often causes a bite that leaves an open, slow-healing wound. Bites from this spider are frequently and mistakenly thought to be brown recluse spider bites. Keep the wound clean and prevent infection. If the bite becomes infected or does not seem to heal, see a physician.”     HOBO SPIDER BITE

In Waiting.... (switterb)

HOBO Spider? In Waiting.... (switterb)


NW Spider Bites (It is that time of year)

 Hobo Spider, a.k.a. Aggressive House Spider

Hobo Spider~NW Menace

Hobo Spider~NW Menace

It is that time of year, spiders are busy building webs, off the web and into those shrubs and flowers you will soon be cutting back, or crawling about your house walls, floors or yikes! under your sheets (how do they get inside and upstairs and under your sheets?). Watch it as you brush up against those flowers and turn down the bedding once in awhile at night (doesn’t that just make your ankle twitch?) and search for the buggers. (re Hobo Spider ID) (OSU info re dangerous NW Spiders)

Hobo Spider

Hobo Spider

An excellent Spider Site…SPIDERZ RULE provides valuable info re these seemingly everywhere crawlies….good pics and accurate information on risk. 

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