Yep, Haus. They are indeed bigger than the Ruby-throated.

Depending on where you are in the Rockies, you could conceivably see up to 6 different species (seen in Rocky Mountain National Park)

https://www.nps.gov/romo/hummingbird_family.htm

All 300 species of hummingbirds are found in South and Central America. 16 different species have been seen in the US.

So, next time you're out there see how many you might spot!

It can be sort of addictive as a pastime...