This may look like the stuff of nightmares, but it's quite normal in Paraná, Brazil. These brown spiders are also known as social spiders. They reside in tress during the day, but in the late afternoon and early evening each spider create a sheet web which they then join together to construct this huge web to capture insects. It takes a village.
Sidebar: Between the years 1993 to 2000 there were 20,699 spider bites in this Brazilian state alone.