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Spiders fill sky as they spin giant shared web

Jercina Cabral Martinelli recorded this video when she witnessed what looked like a sky full of spiders in Espirito Santo do Dourado, Brazil. She was with her grandson, who recorded his own video of the arachnid phenomenon. Local media reported that the phenomenon happens during hot and humid weather, when ideal conditions are created for spiders to build a gigantic web across the sky. The Guardian quoted a biologist as saying that the species of spider, parawixia bistriata, is uniquely social. They form a communal web as an efficient way to trap prey. The fine threads make the web difficult to see, giving the impression that the spiders are floating in the sky. Credit: Jercina Cabral Martinelli via Storyful
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