Steatoda nobilis
(Noble False Widow)

Picture ID 3806

Comments & ID Thoughts

I have no idea what spider this is. They are all over my fence. I am trying to identify this spider so that I can be more familiar with it i.e is it poisonous, aggressive, do they bite. Thank you all in advance.

Submitted by:
djs510
Submitted: Jan 10, 2018
Photographed: Jan 9, 2018
Spider: Steatoda nobilis (Noble False Widow)
Location: Fremont, California, United States
Spotted Outdoors: Man-made structure (building wall, fences, etc.)
Found in web?: Yes
Attributes: Dorsal

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ItsyBitsy

Moderator

January 10, 2018 12:50 pm

This appears to be a duplicate image with different lighting. The spider is a Noble False Widow (Steatoda nobilis). They are in the same family as Black Widows (Theridiidae/Latrodectus) but are not considered to have the that same level of medical significance. They’re not aggressive and are only likely to bite in self defense. They are a fairly new species to the area – a native to Madeira and the Canary Islands they have been increasing their global range since the 1800’s.