These spiders may be tiny (only 3 to 4 mm) but it is hard to miss the presence of their unique webs. These spiders are “sheet weavers” and make a complex web system consisting of an inverted dome-shaped web (the “bowl”), suspended above a horizontal sheet web (the “doily”). The webs are only a few inches in diameter. As seen in this photo, the spider hangs from the underside of the bowl, but above the doily. She waits for prey to drop into the bowl and will bite her victims through the web. You will often see many spiders and their webs in a small area — often containing both a male and a female spider in late summer.
Photo by Glenn Marangelo on 6/22/20 in Condon, MT.