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A collective web of Agelena consociata in Uganda.. A social spider is a spider species whose individuals form relatively long-lasting aggregations.Whereas most spiders are solitary and even aggressive toward other members of their own species, some hundreds of species in several families show a tendency to live in groups, often referred to as colonies.
Spider behavior refers to the range of behaviors and activities performed by spiders. Spiders are air-breathing arthropods that have eight legs and chelicerae with fangs that inject venom . They are the largest order of arachnids and rank seventh in total species diversity among all other groups of organisms [ 1 ] which is reflected in their ...
Spiders have developed several different respiratory anatomies, based either on book lungs or on tracheae. Mesothele and mygalomorph spiders have two pairs of book lungs filled with haemolymph, where openings on the ventral surface of the abdomen allow air to enter and oxygen to diffuse in and carbon dioxide to diffuse out.
The spiders travel by "ballooning", sending up a strand of silk that catches the wind and carries them through the sky. All it would take for a spider to get to Ohio is a favorable wind current.
A spider could also simply climb into someone's mouth. But Rod Crawford, arachnid curator at the Burke Museum, said "spiders probably find sleeping humans terrifying" because we "create vibrations ...
On average, a huntsman spider's leg-span can reach up to 15 cm (5.9 in), while their bodies measure about 1.8 cm (0.7 in) long. [11] Like most spiders, [12] Sparassidae use venom to immobilize prey. There have been reports of members of various genera such as Palystes, [13] Neosparassus, and several others inflicting severe bites on humans. The ...
Spiders can generate pressures up to eight times their resting level to extend their legs, [39] and jumping spiders can jump up to 50 times their own length by suddenly increasing the blood pressure in the third or fourth pair of legs. [13] Although larger spiders use hydraulics to straighten their legs, unlike smaller jumping spiders they ...
Spiders could, theoretically, eat every single human on earth within one year. It gets worse. Those humans consume about 400 million tons of meat and fish each year, so ultimately, the tiny ...