15 Creepy Crawlies That Look Like Spiders but Aren't

If you find spiders fascinating but also a bit unsettling, you might be intrigued by other creepy crawlies that resemble spiders yet belong to entirely different groups of arthropods. This list covers 15 such creatures, detailing what they are, how they mimic spiders in appearance, and why they deserve attention from nature enthusiasts, curious readers, or even those looking to better identify what’s crawling around their homes or gardens.

1. Harvestmen (Opiliones)

Harvestmen, often called daddy longlegs, are arachnids but not true spiders. They have a fused body segment that makes them appear as a single oval shape, unlike spiders with distinct cephalothorax and abdomen. Unlike spiders, harvestmen do not produce silk or venom, and their long, spindly legs are fragile and easily lost as a defense mechanism.

2. Camel Spiders (Solifugae)

Camel spiders, also known as wind scorpions or sun spiders, are fast-moving arachnids found mainly in desert regions. They lack venom but have powerful jaws to capture prey, giving them a fierce reputation. Despite their name and spider-like appearance, they are a distinct order, notable for their large chelicerae and absence of silk production.

3. Whip Spiders (Amblypygi)

Whip spiders are flat-bodied arachnids with extremely long, whip-like front legs used as sensory organs. They have a spider-like form but lack silk glands and venom. Their intimidating appearance features spiny pedipalps used for grabbing prey, and they are primarily nocturnal hunters found in tropical regions.

4. Pseudoscorpions (Pseudoscorpiones)

Pseudoscorpions are tiny arachnids resembling scorpions but without a tail or sting. They have pincers similar to spiders’ pedipalps and often go unnoticed due to their minuscule size, usually under 5 mm. These creatures are beneficial predators of small insects and mites, commonly found in leaf litter and under bark.

5. False Widow Spiders (Steatoda spp.)

False widows are true spiders but often mistaken for the more dangerous black widow due to their similar shape and dark coloration. They possess venom, but their bites are typically mild and rarely medically significant. These spiders are common in Europe and parts of North America, often found near human dwellings.

6. Velvet Mites (Trombidiidae)

Velvet mites are bright red arachnids covered in dense hairs, giving them a velvety appearance. Although they have eight legs like spiders, they belong to the mite family and are usually larger than typical mites. Found in soil and leaf litter, these mites are predators of small insects and help control pest populations.

7. Daddy Longlegs Spiders (Pholcidae)

Pholcid spiders, commonly called daddy longlegs spiders, have extremely long, thin legs and small bodies. Unlike harvestmen, they are true spiders capable of spinning webs, often messy and irregular. They are harmless to humans and frequently found in dark corners indoors, preying on household pests.

8. Ant Mimicking Spiders (Myrmarachne spp.)

These jumping spiders mimic ants in both appearance and movement to avoid predators and approach prey. Their slender bodies and constricted waists resemble ants, while their behavior deceives both predators and prey. Found worldwide, they demonstrate one of nature’s most fascinating examples of mimicry in arachnids.

9. Crab Spiders (Thomisidae)

Crab spiders get their name from their crab-like stance and ability to walk sideways. They often resemble flowers or leaves rather than typical spider shapes, aiding their ambush hunting style. While they look spider-like, their robust bodies and color-changing abilities set them apart from many other web-building species.

10. Scorpionflies (Mecoptera)

Scorpionflies are insects that superficially resemble spiders due to their long legs and slender bodies, but they have wings and belong to a different class entirely. Males have enlarged genitals curved over their backs, resembling a scorpion’s tail, contributing to their misleading name. They feed on dead insects and plant material, playing a role in decomposition.

11. Spider Beetles (Ptinidae)

Spider beetles are small beetles with long legs and rounded bodies, superficially resembling tiny spiders. They are scavengers, often found in stored food products or animal nests. Despite their spider-like silhouette, they are true beetles with hardened wing covers and chewing mouthparts.

12. Daddy Longlegs Flies (Tipulidae)

Crane flies, sometimes called daddy longlegs flies, have slender legs and delicate bodies reminiscent of spiders. These insects are harmless and do not bite or sting. Their larvae develop in moist soil or water and contribute to breaking down organic matter.

13. Pseudoscorpion Mites (Chelonethida)

Although pseudoscorpions were mentioned earlier, some mite species within this group are so small and spider-like they’re often overlooked. They occupy microhabitats like leaf litter and soil, preying on tiny arthropods. Their pincers and compact bodies mimic spider features, aiding in confusion during casual observation.

14. Harvest Ants (Pogonomyrmex spp.)

Some species of harvest ants have long legs and a body shape that, at a glance, might be mistaken for tiny spiders. Their segmented bodies and antennae distinguish them clearly upon closer inspection. These ants are known for their painful sting and seed-harvesting behavior, crucial for desert ecosystems.

15. Spider Crabs (Majoidea)

Spider crabs are marine crustaceans with long, spindly legs that can resemble spider legs. Though unrelated to arachnids, their name and appearance evoke spiders due to their body shape and movement. They often camouflage themselves with algae and sponges, blending into underwater environments.

How to Choose

When differentiating between these spider look-alikes, focus on key biological features rather than just appearance. True spiders typically have two distinct body segments and produce silk; look for web-building or silk use as a clue. Leg count and structure matter too—arachnids have eight legs, but some insects or crustaceans can mimic spider-like forms with long legs. Habitat and behavior offer additional clues: spiders often hunt or build webs, while other arthropods might scavenge or ambush prey differently. For identifying creatures indoors, consider size, movement speed, and any visible body segmentation or antennae.

Frequently Asked Questions

Q: Are all spider-like creatures venomous?
Not all spider look-alikes are venomous. True spiders often have venom, but many arachnids like harvestmen or pseudoscorpions lack venom entirely.

Q: Can these spider mimics bite humans?
Most do not pose a threat to humans. Some, like camel spiders, can bite if provoked, but their bites are rarely dangerous.

Q: How can I tell a spider from a harvestman?
Harvestmen have a fused body without a narrow waist, and they don’t produce silk. Spiders have two distinct body parts and often spin webs.

Q: Are daddy longlegs spiders and harvestmen the same?
No. Daddy longlegs spiders belong to the Pholcidae family and build webs, while harvestmen are Opiliones and don’t produce silk or webs.

Q: Why do some insects mimic spiders?
Spider mimicry helps insects avoid predators or get closer to prey by resembling a feared or unpalatable spider species.

Q: Do spider crabs live on land?
No, spider crabs are marine animals found in oceans, often camouflaged on the seafloor.

Final Thoughts

Spider look-alikes are a diverse group of fascinating creatures spanning multiple orders and classes of arthropods. Understanding their differences helps reduce unnecessary fear and promotes appreciation for the complexity of nature’s mimicry and adaptation strategies. Whether you want to identify a mysterious critter in your garden or simply learn more about arachnids and their relatives, recognizing these 15 creepy crawlies will deepen your respect for the natural world’s intricacies.

15 Creepy Crawlies That Look Like Spiders but Aren’t