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OMG! - Araneus andrewsi - female

OMG! - Araneus andrewsi - Female
Marin County, California, USA
June 5, 2010
Size: ~12 mm body length
I think this huge, terrifying spider is starting to make a web right next to where I have my insect light set up! If it hangs around I'm going to have to evict it (in a non-lethal manner), since I don't want it preying on the moths when they fly to the light, and it just plain scares the hell out of me... I had traumatic experiences with orb weavers as a child. I think it's the same kind of spider as the one pictured below:

Images of this individual: tag all
OMG! - Araneus andrewsi - female OMG! - Araneus andrewsi - female OMG! - Araneus andrewsi - female

Moved from Orb Weavers. We think your original ID is the best choise based on pattern and range.

They're smart
I see a lot of spiders near small lights at night. They go where the food is. Lit windows attract spiders too.

Large but harmless
Though not harmless for your moths! Looks to be in the genus Araneus. We have a question in to Lynette about whether these might be A. pima. They have a similar venter. We're just not yet certain that it is unique to them. Can you get some dorsal images? Depending on your plan for moving her, if you move her in a plastic bag, can you take a closeup shot of the underside of the abdomen. A firm diagnosis of species ID comes from keys to the reproductive parts, anterior, ventral abdomen.

Couldn't get a straight dorsal shot...
But I did get one that shows the pattern on the abdomen.

Nice spider
Can you capture it, take another dorsal shot like this

and if possible take a close-up epigyne shot like this

Then move it to a place you can keep an eye on it to see if it changes as it ages.


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