Arachnids

Joro spiders have spread all over Georgia and its neighboring states, but they don't owe their success to a combative nature — quite the opposite, in fact.

A tiny jumping spider's imperfect ant impression lets it mimic multiple species, enabling it to live in various habitats.

Although nearly all spiders are venomous, a few stand out from the crowd for their potent toxins. So, which spider is the deadliest in the world?

Researchers have found that undernourished bold jumping spiders begin to lose light-sensitive photoreceptors.

Researchers have determined the cause of an unusual behavior in funnel weaving spiders that involves the females curling up as if they're dead before having sex.

Heavy rain in Australia has led to an influx in venomous spiders being washed into people's swimming pools. Species found include funnel-web spiders, the venom of which is so toxic it can kill a child in just 15 minutes.

Brown widow spiders, which are invasive to North America, are wiping out black widow populations in the U.S. by aggressively attacking them for no clear reason, a new study shows.

In a new study, some juvenile sea spiders were able to regrow amputated body parts, which was previously assumed to be impossible in these marine arthropods.

Bites from brown recluse spiders can cause an autoimmune form of hemolytic anemia, in which red blood cells are destroyed by the immune system.