Buzz
Spiders are both well-known and often dreaded creatures, regularly encountered in our environment. While some species can pose serious risks, even leading to injury or death through venom, others cause instinctive fear in people, which might be classified as a phobia. In some species, this fear is entirely justified, but in others, the threat is minimal. However, the spiders' unusual mating behaviors, hunting habits, or strange physical traits might keep you up at night.
10. The Plant-Feeding Spider
Spiders are typically known for their fierce hunting instincts, but the first entry on this list is an intriguing and somewhat ironic discovery: a plant-eating spider. Found in regions with acacia plants in southeastern Mexico and northwestern Costa Rica, Bagheera kiplingi consumes protein and lipid-rich Beltian bodies, which are tiny extensions located at the tips of the acacia trees that this species inhabits.
The Beltian bodies make up the primary diet of this spider, effectively replacing the usual animal prey and providing essential nutrition to this remarkable species. First discovered in the 1800s, it was named after Rudyard Kipling because of the spider’s agility, similar to the leaping panthers in Kipling's The Jungle Book. In 2001, Eric Olson of Brandeis University observed this herbivorous behavior in Costa Rica, which was later confirmed in Mexico by Christopher Meehan from Villanova University.
However, there is a twist in the spider's life on the acacia plants due to the mutual relationship between the plant and the ants that dwell in the acacia's hollow thorns. The ants fiercely protect the plant, attacking anything that attempts to feed on it. In exchange, the ants consume the Beltian bodies and use the thorns for shelter.
Nevertheless, the spiders manage to outcompete the ants for the Beltian bodies by living on dead leaves, places the ants do not frequent. They venture into the plant to snatch Beltian bodies before quickly retreating to safety, using their remarkable jumping skills—an adaptation that would normally help them catch prey—to avoid being attacked by the ants. Occasionally, these spiders may feed on the larvae of the aggressive ants, but their primary diet remains herbivorous, leading an unusually unique existence.
9. The Pelican Spider
The bizarre pelican spiders from Australia, Madagascar, and South Africa redefine oddity in the evolution of arthropods. With a striking resemblance to their avian namesake, these spiders have incredibly elongated jaws and necks.
A long neck protrudes from the spider's compact body, topped with a head shaped like that of a pelican. Small eyes sit at the front of the head, and the chelicerae—jaw-like structures with sharp fangs—extend downward along the neck, sometimes reaching beyond it. The striking form of this creature enables a unique and eerie function that, at first glance, might seem to suggest a cannibalistic nature.
Pelican spiders, part of the Mecysmaucheniidae family, hunt a variety of prey, but the Archaeidae family stands out for its preference for other spiders. They rely on an astonishing and clever use of their specialized adaptations. The pelican spider approaches another spider’s web, tapping it to simulate the movements of a trapped insect, luring its prey in.
The elongated neck and fangs of the pelican spider allow it to strike into the web without being caught itself. As it nears its prey, the spider’s birdlike “beak” pierces the victim with spear-like precision, injecting venom through the fangs at its tip. After a brief struggle, the prey is dragged from the web and devoured.
8. Australian Jumping Spider
Ah, the challenges and victories of spider courtship! The tragic fate of male black widow spiders is a tale often told in natural history. Yet, another species approaches courtship in a uniquely bizarre manner. The male Australian jumping spider (Jotus remus), first described in 2014 by Australian photographer and Department of Agriculture staffer Jurgen Otto, is careful to avoid aggression from the female.
In response, the male adopts a playful, somewhat elusive approach to attract her attention. This tiny spider features small paddles on two specially modified legs, which it waves in an elaborate display as it plays hide-and-seek behind leaves to captivate the female. These heart-shaped paddles are truly unique among known spider species.
This game of “peekaboo” continues until the female is likely to be in a more receptive mood and less inclined to attack the male on impulse. Once she is in position, the male ceases his display and mates with her, his vibrant patterns standing out in the lush surroundings of their habitat.
7. Six-Eyed Sand Spider
The six-eyed sand spider (Sicarius hahni) is a lesser-known but truly fearsome wonder of nature, originating from the arid deserts in the southern parts of Africa. This species, named after the obscure German naturalist Carl Wilhelm Hahn, possesses an extraordinary hunting method that contributes to the mystique surrounding its potential danger.
With a sandy appearance and a leg span of 14 centimeters (6 inches), this spider quickly buries itself in the sand in an astonishing manner. It vigorously digs around itself to make space for its abdomen, then sweeps the sand back over most of its body, creating a camouflage similar to a windshield wiper in motion. With a lifespan of up to 15 years, it refines its hunting technique by lying still, hidden beneath the sand, waiting for prey to approach before leaping forward to capture it.
Although the prey it captures is relatively small, this eerie, ancient spider—often referred to as a living fossil—resembles certain crabs in appearance. Remarkably, it can survive for up to a year on just one meal, provided it has eaten sufficiently. The genus name Sicarius, which means 'murderer,' hints at the danger this spider presents to humans, adding an air of mystery to its existence.
The six-eyed sand spider carries necrotic venom, the full effects of which on humans are not entirely understood. Tests have shown that the spider's bite can prove fatal to rabbits within 5 to 12 hours. While there are no confirmed human fatalities, the species may be linked to cases of limb loss and even potential deaths.
Its hemolytic and necrotic venom damages blood vessels and destroys tissue through direct cell death, making the six-eyed sand spider a contender for the most dangerous spider in the world. It has the potential to kill humans in a manner similar to smaller mammals. Sadly, no antivenom exists to offer any hope of safety.
6. Ogre-Faced Spider
Resembling a strange blend of arachnid features and robotic eyes, the tropical and subtropical ogre-faced spiders in the genus Deinopis possess unusual faces and remarkable hunting skills. Unlike most spiders with their eight eyes and poor vision, these spiders stand out due to their elongated faces and massive, “posterior median eyes,” earning them their eerie name.
The ogre-faced spider’s colossal eyes resemble a massive pair of binoculars embedded in its face, overshadowing its six smaller eyes. This gives the spider incredible visual power, offering superior night vision and precise clarity, enabling it to track and target its prey with remarkable accuracy.
As if its strange, stick-like shape and monstrous eyes with night vision weren't enough, the ogre-faced spider also acts like a 'fisherman' in the air. Equipped with specialized hairs on its legs and remarkable agility, it creates a unique net-like structure with its four front legs, which it then hurls over passing insects, whether they are flying or walking.
Flying insects are captured by the spider when it throws the net backward, while walking insects are trapped when the net is pushed down on top of them. Unlike traditional spider webs, this net is not sticky but functions similarly to a fisherman’s net.
5. Spitting Spider
Eschewing the typical web-spinning method, spitting spiders from the family Scytodidae are an extraordinary example of arachnid adaptability. Unlike most spiders, they lack the silk-producing spinnerets.
Instead, these spiders reside in forests, actively hunting small prey, which they capture by spitting a sticky, venom-laced fluid mixture. This venomous spray immobilizes their victims by coating them with fluids expelled from the poison glands.
Once the prey is trapped, the spider grabs it and injects potent venom that liquefies the prey’s internal organs, allowing for easy consumption. With their long legs and delicate structure, these spiders possess large venom glands to facilitate their extensive spraying of venom and mucus.
The larger the prey, the more mucus the spider sprays, using a head-shaking, spraying motion. Additionally, these spiders have a unique reproductive process—females mature over two to three years and choose mates based on pheromone signals. Mating occurs during random encounters, with males taking care to avoid being mistaken for prey.
4. Black And Yellow Garden Spider
This list highlights not only the uniqueness and wonder of spiders but also how there seems to be a spider for nearly every form of animal imaginable. Whether it's pelicans, scorpions, or now, a spider that resembles the color of a stinging wasp or bee, the variety is astonishing.
While spiders have the ability to inject venom, it's reasonable for a curious naturalist to think that venom alone might not be enough to ward off most agile predators. Spiders are often snatched from their webs by birds, but the black and yellow garden spider may deter such predators due to its wasp-like or bee-like appearance. This orb-weaver species is commonly found throughout North America and is aptly named.
In the case of the yellow garden spider, like many arachnids, sexual dimorphism means the males are much smaller than the females—about one-fourth their size. Interestingly, males are also less colorful than females, which is a notable contrast to the more colorful males of other species, like many birds. Ironically, these garden spiders may end up eating the very wasps and bees their appearance imitates if one of these insects gets caught in their web.
3. Whip Spider
Stick insects are fascinating creatures in their own right, and continuing with our theme of astonishing spiders that appear to be something entirely different, we now introduce a spider that looks just like a true stick insect. The whip spider (Argyrodes colubrinus) of Australia has eight legs, as all spiders do, but its body is remarkably stick-like, with a remarkable length-to-width ratio that defies its spider nature.
With an incredibly narrow body, the abdomen measures only 1 millimeter (0.04 in) in width. However, females can grow up to 22 millimeters (0.90 in) in length, while males only reach 13 millimeters (0.50 in). This unique body shape is where the whip spider gets its name.
Suspended from a minimalistic web made up of a few strands of silk, this spider drops down to capture its prey. The prey mainly consists of wandering spiders, which are ensnared when the spider detects movement in its web and drops down to strike.
It is believed that these spiders tend to target smaller males of other species, rather than focusing their hunting on females. At night, they retreat to hang off plants, but during the day, they blend in with their surroundings, camouflaged as broken sticks, much like a stick insect would.
2. Scorpion-Tailed Spider
The scorpion-tailed spider is one of those creatures that even the most experienced naturalist would look at and think, 'I thought I'd seen everything.' Found in Australia and initially resembling a scorpion climbing through a spider's web, the female of this fascinating species sports a yellowish hue and a body structure that raises questions about its unique adaptations. Despite its strange appearance, scorpion-tailed spiders share similarities with regular web-weaving spiders, apart from the female's extraordinary body appendage.
Extending from the abdomen, a massive structure emerges, surpassing the length of the spider itself. This appendage gives the spider a leaf-like shape, but intriguingly, it also closely mimics the tail of a true scorpion.
When threatened, the species curls its tail in a scorpion-like fashion, serving as a defense mechanism against any predator attempting to attack. The end of the tail has a pronged, club-like structure, reminiscent of the miniature clubs found on certain ancient dinosaur species. The spinnerets are not located at the tip of the extension but rather at the end of the main abdomen, just like a 'typical' spider.
1. Sowbug Killer Spider
For various reasons, many people have an aversion to sowbugs, also known as woodbugs or woodlice, despite their actual classification as crustaceans. The term 'sowbug killer spider' or 'woodlouse hunter spider' may sound appealing to those dealing with a woodbug infestation.
However, these spiders possess an intimidating look and impressive hunting skills, qualities that make them well-suited for their predatory lifestyle. Sporting a reddish thorax, vibrant legs, and a beige abdomen, these spiders appear unnervingly smooth and shiny, with large fangs for their relatively modest body size. Instead of spinning webs, the spider hunts by stalking and ambushing its crustacean prey before delivering a venomous bite.
The challenge, however, lies in the tough, chitinous exoskeletons of the sowbugs that offer protection against predators. Using its disproportionately long, reinforced fangs, the spider punctures this armor and injects lethal venom, disabling its prey efficiently before preparing it for consumption.
The woodlouse hunter spider is found across various environments that support woodlice in North America, Europe, England, and Australia. Although this species hasn't been proven to be dangerously venomous to humans, handling this oversized, fang-bearing spider could be problematic. According to the Penn State College of Agricultural Sciences, skin irritations known as erythema have been linked to the venom of this species.
