Do Daddy Long Legs Make Webs? The Real Answer

Whether a daddy long legs makes a web depends on which creature you’re looking at, because the name is shared by several animals that aren’t closely related.1Pest Me Off. Are Daddy Long Legs Spiders? Three Bugs, One Name Only one of them spins webs, and it’s the one most likely living in the corner of your ceiling or basement. The outdoor daddy long legs many people grew up with isn’t a spider at all and has no way to make silk.2Missouri Department of Conservation. Daddy Longlegs (Harvestmen) So a web is one of the quickest clues to which daddy long legs you’ve found.

Three Different Animals Share the Name Daddy Long Legs

Which one you mean depends partly on who you are and where you live. Most Americans who spend time outdoors use the name for harvestmen, which live on the ground outside.9Burke Museum. Myth: A “daddy-longlegs” is a kind of spider In Britain, parts of Canada, and parts of the southeastern US, people use it for crane flies.10Burke Museum. Myth: A “daddy-longlegs” is a kind of spider People who rarely go outdoors may only know the long-legged house spider and call that daddy long legs.11Burke Museum. Myth: A “daddy-longlegs” is a kind of spider Some of them add “daddy long-legs spider” to keep the house spider separate from the others.12Wiktionary. daddy longlegs – Wiktionary, the free dictionary That’s why the web question confuses so many people: two people arguing about it may both be right about different animals.13Wiktionary. daddy longlegs – Wiktionary, the free dictionary

Crane flies get counted because of those same legs. They have wings and fly, often bumping around lights and windows. They are insects, so they have six legs, not eight like the other two. They are more often caught in cellar spider webs than found in one as a builder.

Why Harvestmen Never Spin Webs

Harvestmen lack the body parts spiders use to release silk and build webs.14Home & Garden Information Center. Daddy Longlegs They also have no silk glands at all.15Missouri Department of Conservation. Daddy Longlegs (Harvestmen) So they can’t spin any thread, not even a single line.16Better Termite & Pest Control. Cellar Spider vs Harvestman (Daddy Long Legs): 5 Differences They have no venom glands either, unlike spiders, which use venom to quickly kill and digest prey.17Home & Garden Information Center. Daddy Longlegs For defense, harvestmen have a pair of scent glands that can release a defensive smell.18PubMed. The Scent Glands of the Neotropical Harvestman Discocyrtus pectnifemur: Morphology, Behavior and Chemistry

People often see a harvestman near an old cobweb and assume it built it. The web almost always belongs to a spider that lives or lived there, and a harvestman resting on it is just passing through.

Without a web or venom, a harvestman simply grabs food with its front mouthparts and tears it apart.19Ohio State University Extension. Ohio’s Natural Enemies: Harvestmen Many are omnivores or scavengers, eating dead insects, droppings, and other organic matter.20Missouri Department of Conservation. Daddy Longlegs (Harvestmen) Some catch live aphids and other small insects.21Missouri Department of Conservation. Daddy Longlegs (Harvestmen)

Since it can’t wait for food to arrive in a trap, a harvestman has to find it by moving. It wanders on the ground, on tree trunks, walls, and plants, and its long legs help it walk over leaf litter and uneven ground. You’re most likely to see them in gardens and woods in late summer and fall.

What a Cellar Spider Web Looks Like

Cellar spider webs are loose, irregular, and tangled, not the neat round webs of garden spiders.22Insectio. Cellar Spider Web — How Do You Identify One? The silk sits in messy, sheet-like clusters that look almost random.23Insectio. Cellar Spider Web — How Do You Identify One? The threads are not sticky, because the web traps prey by tangling it rather than gluing it.24Missouri Department of Conservation. Cellar Spiders25Insectio. Cellar Spider Web — How Do You Identify One? It snarls an insect’s legs in loose threads and slows it until the spider reaches it. The spider hangs underneath the tangle, so it feels vibrations from prey through the silk it’s holding.

Cellar spiders are mostly found indoors, where temperatures stay warm and steady.26The Wildlife Trusts. Cellar spider Their webs usually hang in room corners, where the wall meets the ceiling.27The Wildlife Trusts. Cellar spider They also build in crevices and other tucked-away corners.28Missouri Department of Conservation. Cellar Spiders Basements, garages, closets, and behind furniture are common spots.

To spot one at home, look up in corners and along ceiling edges, especially in quiet, undisturbed rooms. Old webs collect dust and look gray and stringy. A thin, pale spider with very long legs often hangs upside down in the tangle. The spider usually stays near its web rather than roaming, so a web with a spider in it is easy to find.

A disturbed cellar spider vibrates its web rapidly instead of biting.29ThoughtCo. Habits and Traits of the Common Cellar Spider30Insectio. Cellar Spider Web — How Do You Identify One? It bounces and spins until its body becomes a blur.31Insectio. Cellar Spider Web — How Do You Identify One? Predators such as wasps can’t pinpoint where to strike.32Insectio. Cellar Spider Web — How Do You Identify One?

How to Tell a Harvestman From a Cellar Spider

Body shape is the clearest clue. A harvestman’s body looks like a single oval because its two body parts join broadly.33Wikipedia. Opiliones A spider has a clear waist, a narrow pinch between the front part and the abdomen.34Wikipedia. Opiliones If you can see a waist, it’s a cellar spider.

Cellar spider bodies are small and pale, so the waist is easy to miss, and a good view in strong light helps. If you can’t see a waist, don’t assume it’s a harvestman; look again from a different angle.

Eyes give a second clue up close. Harvestmen have only two eyes, set close together in the middle of the body.35Wikipedia. Opiliones36Missouri Department of Conservation. Daddy Longlegs (Harvestmen) Spiders have six or eight eyes, usually around the front edge.37Wikipedia. Opiliones A harvestman’s pair sits on a small bump on top of the body, which you can sometimes see in a close photo. In the cellar spider the eyes are tiny and hard to see without magnification, so treat them as a backup.

Habits settle the rest. A long-legged creature sitting in a web is a cellar spider. One walking around outdoors with no web is likely a harvestman.38Burke Museum. Myth: A “daddy-longlegs” is a kind of spider Anything with wings is a crane fly.39Pest Me Off. Are Daddy Long Legs Spiders? Three Bugs, One Name If you’re unsure, count the legs: six means an insect, eight means an arachnid.

Leg length alone tells you nothing, since both have very long legs. Location is a hint, not proof, because harvestmen can come indoors.

Are Daddy Long Legs Venomous or Dangerous

Harvestmen have no fangs and no venom glands.40Department of Entomology. Are daddy longlegs really the most venomous spiders in the world? They pose no danger to people.41Wikipedia. Opiliones The playground story of a deadly-but-harmless daddy long legs doesn’t fit harvestmen at all.42Burke Museum. Myth: Daddy-longlegs would be deadly but…

Cellar spiders are real spiders, and they can technically bite, but almost never do.43Insectio. Cellar Spider Bite — What Are the Symptoms? Their fangs are small and usually too short to get through human skin.44Insectio. Cellar Spider Bite — What Are the Symptoms? One type’s mouthparts can pierce skin, and its bite caused only a mild sting.45PubMed Central. Not so Dangerous After All? Venom Composition and Potency of the Pholcid (Daddy Long-Leg) Spider Physocyclus mexicanus Venom from a single cellar spider is not lethal to people or other mammals, so it’s reasonable to treat them as harmless to humans.46PubMed Central. Not so Dangerous After All? Venom Composition and Potency of the Pholcid (Daddy Long-Leg) Spider Physocyclus mexicanus

Harvestmen can pinch with their small front mouthparts, but these are meant for tearing small food. Their smelly defense is meant to put off animals that might eat them, and it isn’t harmful to handle.

If you think you’ve been bitten, expect at worst a brief mild sting. Wash the spot with soap and water. See a doctor if pain, swelling, or redness keeps growing, since another cause is more likely.

Should You Leave Them Alone

Cellar spiders work as indoor pest control. They eat insects, other spiders, and other small creatures.47Missouri Department of Conservation. Cellar Spiders They often catch prey larger than themselves, including wolf spiders and crane flies.48Missouri Department of Conservation. Cellar Spiders They are known to trap and eat black widows and brown recluses.49Missouri Department of Conservation. Cellar Spiders They work quietly in corners you rarely check, and since they stay in their webs and don’t bother people, you get this benefit without any effort.

Harvestmen help outdoors. They clean up dead insects and other waste, and some eat aphids, a common garden pest.50Missouri Department of Conservation. Daddy Longlegs (Harvestmen)

If webs bother you, sweep or vacuum old ones from corners now and then. To move a spider, gently carry it outside with a cup and paper. Sealing cracks and reducing clutter gives them fewer hiding spots, though they may return to warm, quiet indoor corners. Killing cellar spiders is rarely needed.

When a harvestman wanders indoors, it can’t build a web, so it won’t leave cobwebs behind. Pick it up gently or guide it onto paper and put it outside. It usually doesn’t survive long indoors without its outdoor food.