Euchloe species? - Euchloe ausonides

County maps are a good place to start with butterflies.

Check out butterfliesandmoths.org

They list only one marble for Alameda County: Large Marble (Euchloe ausonides). Photo in Butterflies through Binoculars The West confirms this ID. Author is the president of North American Butterfrly Association (NABA), which is arguably the standard setter for common names.

… Ron Hemberger, 31 March, 2007 - 9:32pm

Large Marble

Thanks, Ron. I've used the Buterflies and Moths website before - forgot about it this time. I'm new to butterflies, and new to photography, so still have a lot to learn.

… Kay Loughman, 1 April, 2007 - 11:08am

Keep shooting, keep posting

This is a great site to improve your knowledge and skills. It's neat to look back at people's early photos and see how they progress.

… Ron Hemberger, 1 April, 2007 - 1:00pm

Euchloe Ausonides

Lucky dog! I've only found one of these ever, and it remains one of my all time favorite butterflies. I'd say this is Large Marble!
check out
http://livingworldphotography.typepad.com/photos/butterflies_and_moths/large_marble.html

… Will Chatfield-Taylor, 31 March, 2007 - 9:30pm

Large Marble

Thanks, Will. That's a great picture!

… Kay Loughman, 1 April, 2007 - 11:11am