For this species, Eastern Pondhawk (“Erythemis simplicicollis”), “Males become pruinose blue with white claspers and a green face” » http://bugguide.net/node/view/577#id
I liked the shadows cast by his wings, which is why this is not the same image submitted to BugGuide.
Retired economics professor (“dismal scientist”). Married 40+ years to the love of my life; we have two grown daughters, both married, two granddaughters and a...