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These spiders use tens to hundreds of silk strands, which form a triangular sheet with a length and width of about 1 meter (39 in). [8] Pardosa spp. attempting to balloon. In Australia, in 2012 and in May 2015, millions of spiders were reported to have ballooned into the air, making the ground where they landed seem snow-covered with their silk ...
[67] [68] The flexibility of their silk draglines can aid the aerodynamics of their flight, causing the spiders to drift an unpredictable and sometimes long distance. [69] Even atmospheric samples collected from balloons at 5 km (3.1 mi) altitude and ships mid-ocean have reported spider landings. Mortality is high. [70]
Caerostris, sometimes called bark spiders, [3] is a genus of orb-weaver spiders first described by Tamerlan Thorell in 1868. [4] Most species are found in south eastern Africa and neighboring Madagascar .
What they look like: With over 200 species of wolf spiders crawling around, it’s no wonder that they range in size and appearance. “The largest species can be up to an inch and a half long ...
The species is active mainly at night. In the wild they can be found hiding under rocks or bark, but may reach human-occupied areas during migrations. When the spider feels threatened, it lifts its front torso, swinging its feet to expose a red stain on its mouth and fangs. If the threat continues the spider will turn and look for a place to hide.
Females can live for up to eight years, while males die shortly after mating. These spiders live mostly in buildings or walls. They look rather similar to T. ferruginea. Tegenaria parietina with a 3.5 inch diskette in the background.
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