Hyles lineata, the white-lined sphinx moth, is sometimes known as the hummingbird moth because of its bird-like size and flight pattern.
Transcript (edited for clarity):
RUDY MANCKE:
Hi, this is Rudy Mancke from USC for NatureNotes.
Joyce was watering her garden, zoomed in a photograph of the periwinkles that were there, and then saw something hovering over the flowers. She assumed it was a hummingbird, just wondered what it was. She was over in Ridge Spring, South Carolina.
It was one of the sphinx moths, and it has a white line that runs from the edge of the wing all the way across the front wing. White-lined sphinx moth is the common name for it. It often flies at night. A lot of the sphinx moths are more active at dusk or dawn or in the evening.
And this one hovers like a hummingbird. Some people would call it a hummingbird moth. Long tongue, you could actually even see that. Widespread and in very state except Alaska.