Do Spiders Poop? 10 facts and 4 easy ways to get rid of it

Call it juvenile, but we think it’s hysterical that people want to know the answer to the question: do spiders poop? Spider poop is actually a hot subject, and we’re going to dive into this dirty topic to answer the questions surrounding arachnid fecal matter once and for all. 

Do spiders poop?

Do spiders poop? Yes, spiders poop. In fact, all spider species poop. On top of that, all animals, insects, and beings that ingest food poop. Spiders eat flies, mosquitos, pantry moths, ants, and other insects. While their venom liquefies the usable parts of these insects’ bodies, they puke up the hard shells. What they’re not able to use for nutrients becomes waste, and they have to excrete it to continue eating and surviving. 

Is webbing spider poop?

No, webbing is not spider poop. Spider webs are much different than their poop, and they don’t come out of the spider’s anus like spider feces does. Webbing comes from the silk glands and comes out of their spinnerets, and they use the silk to produce webs to catch prey, construct egg sacks, build shelter, or create transportation. But, spider web is not poop.

spider infestation

Do spiders poop eggs? 

Spiders do not poop eggs. Male and female spiders each have sexual organs, and spider females produce eggs and pass them through their vaginas and into egg sacs. They then stash these egg sacs in remote places that are unlikely to be disturbed like a crack or crevice, an abandoned storage container, or in their nests. Other spiders carry their egg sacs around rather than place them down where they could be in danger.

What does spider poop look like?

Spider droppings look like small blotches of splattered paint or ink. It’s usually dark, being black, brown, or gray in color, but white droppings are not uncommon. When the poop is fresh, it looks like a thick liquid dripped from the tip of a pin. It soaks into the surfaces it lands on and, as it dries, it looks like ink splatter. 

Note: Spider poop can be liquid at first, similar to stink bug poop, and it soaks into the surface as it dries. This is completely different than frass, which comes from carpenter ants and termites, and requires to totally different approach to solve, or poop from silverfish with resemble small pellets.

spider poop
Those dark ink stains are actually spider poop. Photo credit: George Oates

Does spider poop smell?

Spider poop most likely has a scent of some sort, and as it decomposes, it will produce ammonia. However, since spider droppings are so small and humans’ scent receptors are so weak, we cannot smell the poop or the small amounts of ammonia produced. 

Where do spiders poop?

Spiders poop wherever they feel the need. They can poop from a web in the corner of the room, dropping feces to the floor or on a window sill. They can also poop as they travel across furniture or countertops. However, homeowners who find spider poop usually find it in a concentrated area near the web.

Does spider poop stain?

Spider poop absolutely stains. This dark, inky substance can soak into fabrics and wood fibers, leaving dark discolorations behind. Even if the poop is immediately wiped up, it may leave a yellow tinge or stain behind. 

spider infestation

Is spider poop dangerous?

Spider poop can be dangerous. These arachnids eat some of the most disgusting bugs on the planet, including filth flies. These insects contain pathogens, and pathogenic bacteria can potentially make their way through the digestive system and into their poop, potentially making spider poop toxic.

However, it’s important to note that while spider poop has the potential to be dangerous, it’s usually not. Researchers believe spiders have antimicrobial properties in their blood and venom, and these properties kill pathogens before the spider poops them out. 

Does poop mean I have a spider infestation?

No, just because you find spider feces does not necessarily mean you have a spider infestation on your hands. All spiders poop, so even just one spider in the house could leave poop behind. But, there are other signs that could indicate that a spider infestation is brewing:

  1. Finding several webs around the property (or even in your Christmas tree during the holiday season) can be an indication that there is a spider infestation. Spiders use these webs to catch prey, protect egg sacs, and shelter themselves, and finding several in the house likely indicates that there is a problem. 
  2. If you’re finding small, round balls that look silken in texture, you’re likely finding egg sacs. Egg sacs can contain hundreds of spiders, so it’s best to get rid of them ASAP before they hatch and cause a spider infestation.
  3. If you’re finding what appear to be dried, dead spiders, you’re likely finding molts, and molts are a sign that there is a spider problem. Molts occur when spiders outgrow their current skin, shedding the outermost layer in order to grow larger.
  4. If you’re waking up with small, itchy bites, you might have a spider problem. Spiders have fangs that can pierce human skin, often resulting in slightly-inflamed, red, itchy bumps. Spiders may be biting while you sleep.
  5. Spiders follow food, and if there are a lot of other insects around, they’re likely to set up shop in a home. The best way to stop the pooping is to eliminate spiders, and the best way to do that is to get their favorite meals out of the house.
Spider molt

How do you clean spider poop?

If you found spider poop around your house, you probably want to get rid of it immediately. Luckily, there are a few different ways that you can clean spider poop detailed below.

Water and Bleach

Water and bleach can be an effective combination for cleaning up spider poop and removing any stains. We suggest using oxygen bleach because it’s safer and less likely to discolor the surface. Simply mix a 1:1 ratio of bleach and water in a spray bottle. Spray the stained area with a stiff-bristled toothbrush, and wipe away the residue.

Hydrogen Peroxide

Another product that you can use (that you probably already have around the house) to remove spider poop is hydrogen peroxide. Just wet a cotton ball or washcloth with hydrogen peroxide and place it on top of the feces. Let it sit for 5 minutes before wiping the stain and residue away with a clean paper towel.

Vinegar and Baking Soda

Vinegar and baking soda is one of the best homemade household cleaning combinations, and it’s effective on spider feces. Just create a foamy paste by applying equal parts of baking soda and vinegar to the stained area. Use a stiff-bristled brush and work the paste over the stained area in circles. Be sure to wipe the excess off with a paper towel.

Keep in mind that vinegar can also be an effective spider spray, so keep this versatile staple in stock.

Bird and Spider Stain Remover

Finally, there are products out there specifically made for spider droppings. Star Brite’s Bird and Spider Stain Remover comes in a spray bottle, ready to use on spider poop. It doesn’t contain bleach or abrasive materials so it shouldn’t discolor or scratch surfaces. It’s also safe around pets and kids 

FAQs

Do spiders fart?

Believe it or not, the jury is out on whether spiders fart. Some researchers believe the way that their venom breaks down insects and turns them into liquids, it’s highly unlikely that spiders fart. And, if they do, no one has heard or smelled it.

Do spiders pee and poo? Do spiders urinate?

Spiders do poop but they do not pee. Their poop consists of all the waste products that their bodies need to get rid of. And, instead of producing urine, they produce uric acid waste, which is solid. They do this because they can’t afford to lose water like humans or other animals can.

How big is a spider’s poop?

Spider poop is usually small, appearing as though it’s a drop of dark ink stains that fell from the tip of a pen.

Do spiders stay alive when you vacuum them?

According to the Smithsonian, almost all spiders die in vacuums. It may be from the trauma of being sucked up and spun around a vacuum canister, or from thirst. 

What does spider poop look like?

Spider poop looks like ink dots that dripped from the tip of a pen. If it’s fresh, it will appear wet and mound-like. If it’s been there a while, it will likely appear lighter and drier.

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