Can you tell me what kind of butterfly this is?

A scruffy visitor to my garden.  I am off to the book store to get a book about butterflies because I want to attract more!  Does anyone know what kind it is?  I may have to paint him.

"Colorful Whites", a Peek inside my Watercolor Journal

Here are some pages from my current Watercolor Journal.  I am playing around with creating colorful whites by adding local color(color from the surrounding areas) in the shadows.