Steatoda grossa
(False Black Widow)

Picture ID 8000

Comments & ID Thoughts

Triangualr cobweb spider. Found crawling on my bed 11:00am. It was about the size of a quarter. Made me nervous. Should I have been nervous??!!

Submitted by:
jscopperlily
Submitted: Mar 28, 2018
Photographed: Mar 28, 2018
Spider: Steatoda grossa (False Black Widow)
Location: Sacramento , California, United States
Spotted Indoors: Other
Found in web?: No
Attributes: Lateral

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Jscopperlily

Photo Owner

March 28, 2018 2:55 pm

Do Triangular spiders bite? Why was it on my bed during the day?

ItsyBitsy

Moderator

March 28, 2018 3:12 pm

Hi, welcome to Spider ID. 🙂 This is a False Black Widow (Steatoda grossa). They’re only likely to bite in self defense – which could happen if you rolled onto one in your bed. I do not know why it was in your bed, they usually keep to themselves. Perhaps her web was destroyed and she was looking for a better place to build or she was carried in on something. They’re easy enough to relocate outside. Just place a cup over the spider and slide a stiff piece of paper underneath. You can reduce the number of spiders you… Read more »