Wood Frog (Rana sylvatica).
I'm not terribly happy with the work scanner at the moment, but this is close. Maybe a little greener than the original, but not too bad.
Wood frogs are cool, but since I'm at work right now I don't really have time to go into it. They can pretty much freeze solid in the winter, though.
Um, sorry for that last bit. Stay tuned for the rest of the Wood Frog life cycle coming up in the next few days or so. I hope.