An large communal web of at least about 50 m2 with thousands of spiders was observed on piles of litter and garden waste on an abandoned parking lot in a forest near Wageningen (province of Gelderland). The spiders belonged almost exclusively to the exotic and invasive Ostearius melanopygius, but thirteen other spider species could be collected as well from a single top of the web. Prey items emerged very abundantly from the organic waste, explaining the high spider density at this site. The communal web consisted of non-sticky threads and was triggered by the onset of the ballooning period, and was observed from the beginning of august till the beginning of November 2019.

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