#yellow sac spider

[onenicebugperday]

@canwehavehextonite submitted: can you ID this lil guy? def arboreal, made a little hammock much like jumping spiders do high up in our bathroom. located in southern wisconsin!

Yup, it's a yellow sac spider. Named after the lil sac-like hammocks they make to retreat into when they're not out and about doing spider stuff.

[critter-creature-or-beast]

[xaeyrnofnbe]

for all the spiderlovers out there, here's my bathroom spider, who i'm pretty sure is a black-footed yellow sac spider. i've been calling it bathrooms spider :]

it usually sits up on the edge corner of the ceiling in or near it's cozy little sac, like it spends 99% of its time up there or some unknown location, and last night was the first time it came down to a spot i could look at it and photograph it. i'm aware they're venomous, but this guy has literally never been a problem to anyone. thoughts?

[morbidsmenagerie]

Yellow sac spider molted to maturity and then ate again.

[mrsmountainchicken]

— Cheiracanthium mildei. 16.04.2024. Switzerland. 

Eine der grösseren Spinnenarten, welche sich von Zeit zu Zeit in unserer Wohnung verirrt. Es handelt sich wahrscheinlicherweise um eine Cheiracanthium mildei.

Neben ihrer ebenfalls in der Schweiz vorhandenen Artgenossin Cheiracanthium punctorium, kann auch sie einer menschlichen Bedrohung spürbare Bisse verpassen. Weshalb diese beiden ebenfalls zu den "gefährlichen" Spinnen in der Region gehören.

Die Kleine war nicht auf ihre Gefangennahme gefasst und rannte mit einem ungeheuren Tempo im Glass umher. Als ich sie nach draussen setzte, stellte sie sich tot. Ich hatte schon Angst, der Kleinen einen Herzkasper verpasst zu haben. Nachdem ich sie jedoch sanft mit dem Papier anstiess, hatte sie sich aufgerappelt und mir neugierig entgegengeblickt.

A friend visited! What I assume to be Cheiracanthium mildei, one of the larger spiders here in Switzerland. Despite my husband not being a fan of them, they sometimes find their way into our home.

These spiders are one of the few that may puncture human skin. However, their venom is said not to be that significant.

My little friend was surprised by her capture, running laps within the glassy prison she found herself in. As I put her outside, she decided to play dead. I was worried that I had given her a heart attack, so I gently nudged her with the paper. Thankfully, she sprung up and took a breather while watching me curiously.

[sitting-on-me-bum]

Yellow sac spider

The yellow sac spiders (Cheiracanthium) are in the family Cheiracanthiidae and they probably account for more human bites that any other type of spider. These arachnids are distributed all over the globe, from America to Northern Europe, South Africa to India, and even Australia and Japan. They’re nocturnal predators and during the day they hide in small white web cocoons.

It is the only spider in Europe whose bite can penetrate human skin.

(Image credit: fhm via Getty Images)

[the-blackjay]

My friend. The angel who guards my window. Perfect. Unproblematic. Does her best.

Evil bastard. Shouldn't exist. Disgusting. Abomination. He knows what he did and knows I will stop at nothing to find him.

[bjugnakraekir]

nerd time!! spidersona research!!!

if you see something that is incorrect please let me know!!!!

Yellow Sac Spider/Cheiracanthium

Bite: Creates surface lesion with redness, swelling, burning. Medical attention recommended. Venom is slightly necrotic to humans

Behavior: Bites without reason, hunter (actively chases prey), cannibalistic, most common spider bites. Nocturnal. Do not jump, fast moving, escapes with silk when startled.

Habitat: Gardens, bushes, trees, during cold weather may seek shelter in houses. Northeastern United States, range expanded in recent decades, central Europe.

Size: Females body size range 5-9mm, males 4-8mm. Leg span 2.5cm/1in. Front pair of legs are longest. Males have more slender bodies.

Coloration: Light yellow body, brown jaws, darker legs, vertical dorsal stripes on abdomen. Males are darker. Diet can affect coloration

Body: Scopulae allows them to cling to smooth surfaces like glass, 8 eyes

References: Nebraska University dep of entomology, Wikipedia, WebMD,

Note: I lost some of my references for this entry - take with a grain of salt

Yellow Amycine Jumping Spider

Note: I will be refrenceing Amycine when I can but not much is known about the species

Bite: Unlikely to bite humans, usually runs away. Causes redness, itching, stinging, and swelling. Can be cleaned with soap and water, does not require medical attention

Behavior: Can move rapidly sideways and backwards, pounce on prey. Can jump 20-50 times their body length, use silk dragline when jumping as safety line. Jumping is caused by sudden blood flow change, fully extending legs. Eats insects and other spiders, may drink nectar and plant matter. Hunts during the day.

Habitat: Vegetation, rocky areas, very widespread - no specific habitat. Not found in Greenland

Size: 3.175mm/0.75in, have larger front legs

Coloration: Extremely translucent, eye cones are visible. Joints are dark due to blood flow.

Eyes: Has two eyes on the front, two on each side, and two on the back of their head

References: Wikipedia, US Dept. of Agriculture, Washington State, PestWorld.Org, Michigan State

Striped Lynx Spider

Bite: Little danger to humans, only cause temporary pain and swelling.

Temperament: Daytime ambush predator, nimble. Can shoot venom 20cm/7.9in, only observed in adult females. Strong sense of smell to detect prey. Consuming nectar early in life can deter cannibalism and lengthen lifespan somewhat. Jumps and uses dragline like jumping spiders, is not classified as one.

Habitat: Native coast to coast of southern United States, Mexico, Central America, and the Caribbean. Lives at the top of vegetation in open areas like fields and backyards. Most well seen in Florida and American South.

Size: Females 5.7-6.7mm, males 4-4.5mm and more slender. Fangs are large in proportion to head

Coloration: Pale yellow, can adjust coloration. Males resemble females, but are iridescent that can appear coppery, silvery-green, or purple. Males are usually more red/orange

References: North American Insects & Spiders, University Florida, University Florida, University Florida, iNaturalist

Other spiders I want to look at later: Heliophanus flavipes, Telamonia dimidiata, Crab spiders, Misumena vatia, orchard orbweaver

Note: Always do your own research!!! Doubt the information I gave you!!!

[punkgardener]

Yellow Sac Spider PSA

[ahhvernin]

Lemon my bathroom spider has gain popularity in a facebook group. Does this make me its manager? Anyway, Lemon is facebook famous now, or at least in this group. lol

[bob1381975]

Yellow Sac Spider | one of World’s Deadliest Spiders

[onenicebugperday]

@flowerbarrel submitted: Hello again! I found a new spider this past weekend in (please remove location) [removed]. I was walking out a door and the funny little spood suddenly rappelled down in front of me. I almost walked right into her too! Got as close a photo as I could before she crawled out of sight. Sometimes there are a lot of flies in that building so hopefully she likes living there.

Cute lil yellow sac spider. From what I can see of the pedipalps this one may be a male! Hope he’s enjoying all those fly meals :)

[spider-posting]

[1/22/24]

New Year, New Spiders.

This one was taken by my friend! It's a yellow sac spider. Very cute. I don't see these where I live, I only see bold-faced sac spiders. So this is a special little treat.

[ecologydog]

Trying to undo my fear of spiders by taking pictures of them and was very fond of this ceiling spider/yellow sac spider (Cheiracanthum inclusum) sheltering in the table flowers. Very common to find inside and has an unfounded reputation of incessantly biting humans and being incredibly dangerous (causing necrosis around the bite area) when in reality it doesn’t tend to bite humans anyways, and if it does the symptoms are mild and short lived. Being nocturnal, it usually spends the day in a silk sac before leaving, usually a ceiling corner or other infrequently disturbed spot, to hunt other creatures.

References used to ID

[morbidsmenagerie]

Yellow sac spider in her sac

[gyrrakavian]

The Spiders in your House - The Yellow Sac Spider