Just flew in my window a few minutes ago, making so much noise with his robust and sizeable self that I thought it was one of the cats. He is about 3" long, and 5" wide.
He kept perching places and vibrating his wings blindingly fast.
That’s him! Funny, I was going to describe the moth as being not much smaller than a hummingbird, and apparently the White-Lined Sphinx Moth is sometimes also called the hummingbird moth.
(Moth and butterfly taxonomy amuses me. So meticulously descriptive and formal. Reminds me of a band back in the 1980s who did a song called “Great Spangled Fritillary.”)
I saw a white-lined sphinx moth caterpillar in March, munching on the wildflowers of the superbloom in Death Valley. It was the biggest animal in probably a square mile!