A video circulating around the net shows what looks to be a scary clump of spiders, but in reality it shows a harmless cluster of opillonids, aka "daddy long legs" just trying to stay warm.
The nickname "daddy long legs" and the appearance of the creepy crawlies have contributed to the confusion.
Opillonids, according to the UC Riverside Department of Entomology, are arachnids in the order Opiliones and aren't even spiders.
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Keep in mind that all spiders are arachnids, but not all arachnids are spiders. Opillonids, also called harvestmen, consist of one basic body segment - plus legs - while spiders have two main body parts: the cephalothorax and abdomen.
Harvestmen are not at all poisonous to humans.
"These arachnids make their living by eating decomposing vegetative and animal matter although are opportunist predators if they can get away with it," a fact sheet released by the university shares. "They do not have venom glands, fangs or any other mechanism for chemically subduing their food. Therefore, they do not have poison and, by the powers of logic, cannot be poisonous from venom."