Woke up the other morning to this gorgeous visitor hanging out on the window screen. I believe this is a male because of the pronounced combs on the antennae, but I haven't made a positive identification of the exact species of sphinx moth.
White-lined sphinx moth
I don't believe it is the white-lined sphinx moth, which I have encountered before (no banding / spots of white on the abdomen and wings). Sphinx moths are also commonly known as hummingbird moths, and they are actually about the size of a small hummingbird and have similar flight patterns as they pollinate flowers.
He didn't open his wings so I couldn't see the coloration of the top surface of the hind wings, which is a primary way to identify sphinx moths. This might possibly be a one-eyed sphinx moth because of the single eye-like marking visible from the underside of the wing, although the color pattern around the head is different than the images of one-eyed sphinx moths I saw online. If anyone has a better clue exactly what kind of moth this is, let me know! Encountered in the Utah Valley, Utah, USA.
Sphinx moths are very large insects!