Not hummingbirds, maybe hummingbird moths?

[Acer]

PeterB wrote:
[quote=voodoopenguin]
A little video my daughter took four years ago in her garden.

https://youtu.be/prZ8nlqQedE

Paul

Wow, I didn't get anywhere near such a good look as that ... mine seemed very skittish and would tend to fly away if I approached. (Also they were all out there at dusk, so the lighting was terrible.)

I take it these things aren't considered pests, since they're pollinators?
The caterpillars can damage some plants. They are in the Sphinx family with tomato hornworms and the like. But, being native insects to North America, I say that's our problem, not theirs.