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Extension > Yard and Garden News > Orb weaving spiders

Friday, September 16, 2016

Orb weaving spiders

Jeffrey Hahn, Extension Entomologist

Spiders are particularly common around homes and gardens during late summer and fall. Undoubtedly the most common types are the orb weaving spiders (family Araneidae). These spiders can be recognized from the large, circular, flat webs that they construct. They vary in size although many are moderate to large sized.  Some species are very colorful. They typically have round, plump abdomens with relatively short stout legs.
Black and yellow argiope spider, a
common spider during late summer and
fall.  Photo: Jeff Hahn, U of M Extension

There are two common groups of orb weaving spiders that people commonly encountered, spiders in the genus Argiope and those belonging to the genus Araneus.

Argiope spiders, also referred to garden spiders are large with a body length up to one inch long, and conspicuously colored yellow and black or silver, yellow and black. Their abdomen is more oval compared to most orb weavers.

Araneus species are typically moderate sized.  They can be either brownish or colored brightly, especially orange or yellow.  Their abdomens are generally more round, sometimes even somewhat triangular.  Common species include barn (orbweaver) spider, cross orbweaver, shamrock orbweaver, and marbled orbweaver. Click here to learn about other Araneus orb weaving spiders.

Fortunately despite their appearance, orb weaving spiders are not aggressive or dangerous to people and no control is necessary. In fact, orb weaving spiders are fascinating to observe and people should consider themselves fortunate to have an orb weaving spider in their garden or yard to watch.

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