But don't worry, arachnologists have come out their poorly lit corners to reassure us that there's no such things as spider clouds that rain down on us as some sort of biblical punishment. No no no, these spiders aren't falling. They're resting on giant invisible webs, waiting to ensnare their prey.
The critter in question, parawixia bistriata, is one of the rare breeds of social spiders, which have learned to work together to hunt in horrific hordes. During the day, they cuddle in mass clusters right beneath our feet, and during dusk, the colony comes to blanket the sky with webs up to 13 feet wide and 10 feet thick to feast on whatever lands in their kill zone, be it flies, mosquitoes, or even birds.
While residents of Minas Gerais are still creeped out by the spider walls, they know to expect their itsy-bitsy sky blankets during summers that are excessively hot and humid -- something that's happening more and more for some reason. But Brazilians should be grateful for their appearance, says spider professor Adalberto dos Santos (that is, a professor of spiders, not a spider who is a professor), who told The Guardian that the spider walls are an excellent counter to also-terrifying mosquito swarms that buzz around during the swampy summer days. "They benefit us far more than they harm us," he adds. Sure, try telling that to whatever drunkard stumbles into their webs and gets insta-mummified.