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arachnids

In February 2020, naturalist guides Lizardo Proaño and Juan Carlos Narváez photographed a harvestman eating a live frog during a night hike at Mashpi Lodge in Ecuador.

Daddy Longlegs Seem to Hunt Frogs in South America, Revealing the Gangly Arachnids as Overlooked Predators

A new study suggests that harvestmen actively attack the slippery amphibians, rather than just scavenging them. The findings hint that the spineless creatures have a more complex relationship with vertebrates than previously thought

African fattail scorpion (Androctonus amoreuxi)

Scorpions Are So Metal—Literally. New Images Reveal Patterns in How Their Weaponry Is Fortified With Iron, Zinc and Manganese

Scientists knew the stingers and pincers of these arachnids generally contained metals, but a new Smithsonian-led study maps out how these components are distributed

A polar bear cub walks along the ice in Svalbard, Norway.

See 24 Astounding Images From the Wildlife Photographer of the Year Contest—and Vote for Your Favorite

The public will choose the winner of the People’s Choice award in a vote that runs from February 4 to March 18

A silver Argiope spider in a spiderweb with stabilimenta.

These Mysterious ‘Decorations’ in Spiderwebs Might Help Spiders Better Locate Their Prey

Researchers used computer models to simulate if and how these features influence prey affect vibrations of orb-weavers’ webs

Joro spiders are essentially harmless to humans and pets, but scientists are concerned about their impact on native species.

Scientists Want Your Help to Track the Spread of Invasive Joro Spiders at Great Smoky Mountains National Park

The invasive arachnids were first spotted in the park last year, and now, researchers hope to keep tabs on when and where they occur

For the first time ever, the genome of a knotty sea spider was sequenced in high resolution.

These ‘Weird’ Sea Spiders Don’t Have Abdomens—and Instead Store Organs in Their Legs. With DNA, Scientists Are Learning Why

Researchers sequenced the knotty sea spider’s genome for the first time, revealing a missing gene that many other animals have

A funnel-web spider patrols its web, waiting to detect the vibration of unsuspecting prey.

Getting Annoyed at Your Noisy Neighbor? Spiders Are, Too. New Research Finds They’ll Build Webs Differently in Loud Conditions

In lab experiments, spiders changed how they constructed their webs in noisy environments, and rural and urban spiders responded differently

Australian Reptile Park spider expert Rob Porter milks a male Sydney funnel-web spider to create antivenom in 2001.

Australian Zoo Asks Residents to Capture the World’s Most Venomous Spider: the Deadly Sydney Funnel-Web

The Australian Reptile Park’s annual callout is crucial to creating life-saving antivenom

A 2007 illustration of Arthropleura, the largest known arthropod, which grew nearly as large as a car. New research suggests previous visualizations of the animal's head were incorrect.

Fossils Reveal the Face of an Extinct Nine-Foot-Long ‘Millipede,’ the Largest Arthropod to Ever Live

Scientists in France solved the evolutionary mystery of this prehistoric monster, which resembles both the centipedes and millipedes of today

An orb-weaver spider wraps a male firefly in silk while it flashes from its lanterns. Male fireflies typically signal with multiple pulses using two lanterns, while females emit single pulses from one lantern.

These Spiders Use Captured Fireflies as Flashing Lures to Snare More Prey

A new study suggests orb-weaver spiders manipulate trapped male fireflies to emit female-like signals, which in turn draws more males into the web

A diving bell spider with a captured bug under the water

These Funky Spiders Are Lurking by the Water

Some make nests inside seashells, while others tote bubbles of air on their backs

While spiders can have up to eight eyes, daddy longlegs, which belong to a different order of arachnids called harvestmen, usually have just two eyes.

Daddy Longlegs Have Four Extra, Hidden Eyes, Researchers Say

The new discovery could help scientists unravel the mystery of how the arachnids evolved across some 537 million years

Joro spiders aren't particularly bothered by the vibrations of a busy city environment.

Joro Spiders, Spreading in the Southeast, Can Survive Surprisingly Well in Cities

Unlike most spiders, the hustle and bustle of urban areas doesn’t seem to disturb the non-native Joros, a new study finds

Hercules measures 7.9 centimeters from foot to foot, making him larger than a baseball.

Meet ‘Hercules,’ the Largest Male Funnel-Web Spider Ever Found

Despite belonging to the most venomous arachnid species on Earth, the spider will be using his bite for good in a program to produce antivenom