Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Photo#594167
Cross Spider? - Araneus diadematus - female

Cross Spider? - Araneus diadematus - Female
San Mateo County, California, USA
October 13, 2011
Found in a friend's suburban yard. Other specimens were larger...but "got away". (You know, two or three feet long :-)

My friend speculated that the cross like pattern might be enough to ID it, so I searched BugGuide using the phrase "cross spider" and came up quite quickly with Araneus diadematus, which I'm betting is correct. Here are some BG posts thereof:


I'm very inexperienced with spiders, so will appreciate helpful comments.

Images of this individual: tag all
Cross Spider? - Araneus diadematus - female Cross Spider? - Araneus diadematus - female Cross Spider? - Araneus diadematus - female Cross Spider? - Araneus diadematus - female

Great shot
Can you rotate this first one so the head is pointing down? (I'd like to use it on the guide page.) Also can you rotate the last two so the 'butt' is facing down?

 
Guide page request
OK, Lynette...changes done :-)

 
Thank you
This image is now being used on the info page.

Moved
Moved from Spiders.

and you and your friend
are both perfectly correct!

 
Thanks J & J :-)
I'll move it to the species page.

BTW, is it easy to tell if it's a male or female?

 
Male vs. female
Yes. The females have the large, sometimes almost swollen abdomen that you see here and "normal" pedipalpae (first pair of limbs nearest the chelicerae/mouth). Males are generally much slimmer in appearance and often smaller, and when mature the papal tibia are transformed into secondary sex organs that are used to transfer the sperm to the female; from a distance they look somewhat like "boxing gloves".

This general male-female characterization holds true for most of the true spiders.

 
Very Helpful
Many thanks, Kevin, for the clear and detailed response.

The "boxing gloves" of the male are clear in the following post:
.