Yesterday afternoon, June 1, with September months away, I saw what I thought was a clearwing moth feeding among the bumblebees on the honeysuckle just outside the front door. I though this might be a snowberry, Hemaris diffinis, but then I started checking around. According to What's that Bug?, this is a sphinx moth, as the clearwings are, but they identify this one as a Nessus sphinx (Amphion floridensis).
It seems that the clear, yellow bands on the abdomen are what trigger the identification. But I'm confused--this is definitely a moth that hovers when it feeds (thus the blurry photos), which I thought was the sign of a hummingbird moth, a clearwing. This moth was smaller than the thysbe, and differently marked, but similar in morphology.