Selasphorus rufus

We returned from our trip to Colorado, happy to see that the birds in the back yard did not seem to miss us very much. We often get two or three hummingbirds buzzing around our yard, chasing each other away from three little feeders, but we visited an amazing place in Ridgway, CO where the lady of the house maintains some thirty feeders and a wonderfully beautiful flower garden. There must have been a thousand hummingbirds buzzing all around. We stayed there for an hour, I took a few pictures, and so now I am trying to figure out how to get more to visit our back yard without having to go through many pounds of sugar every day.
 
This male Rufous (in our back yard) has claimed a perch atop a hibiscus bush (Rose of Sharon), where he launches his attacks on anything hummingbird-like that moves. The bush should start flowering soon, and I am curious to see if that makes the little birds less aggressive, when there's more nectar to go around....