This blue beauty alighted on my patio this afternoon. This is a Black Swallowtail - female. The males of this species have much more yellow spotting and less vibrant blue spotting. Here are some wonderful photos and more info of this lovely butterfly.
I'm a transplanted New Yorker who loves the Tucson climate. On New Year's Day I have a bit of fun calling my (snowbound) east coast friends to announce that I'm drinking coffee while sitting on my patio. (: