While on the deck trying (mostly in vain) to take images of hummingbirds in flight, a creature buzzed by me heading to a nearby flower. But it wasn't the target of my photography, it was an imposter!
It hovered like a hummingbird and ate nectar like one too. But it was smaller and didn't create that loud buzz that hummingbird wings do.
It was a Hummingbird Clearwing moth, a sphinx moth in the Sphingidae family. It has a long proboscis which allows it to eat nectar from deep, tubular flowers, and that coils up when not in use. The caterpillar feeds on honeysuckle, snowberry, hawthorn, cherry, and plum, the latter two which we have in our yard.
Source: Peterson Field Guide to Moths of Northeastern North America by David Beadle & Seabrooke Leckie