From Google on Earth Day: The Rufous Hummingbird is a small hummingbird, about 8 cm long with a long, straight, and very slender bill. These birds are known for their incredible flight skills. Some are known to fly 2000 miles during their migratory transits. The Rufous humminbird's migratory pattern goes through the Rocky Mountains down into Mexico. Males sport a white breast and an orange-red throat patch; females tout green and white coloring with orange feathers and a dark tail. They are the only hummingbirds with the rufous/rust-red coloring, and the iridescent throat of the males is amazingly vibrant.
This is a female Rufous on a chilly day, an image I posted on Facebook.