Recently I had the good fortune to sit near a busy Hummingbird feeder that attracted up to 5 individuals at a time. I took an hour away from chatting with relatives to make the pictures you see here (all are Ruby Throats). This guy probably was recently fledged, and his type constantly blusters and chirps to take a sip. Females are usually less aggressive, have no markings or color on their cheeks or throat, and their tails are rounded instead of notched.
Lots of hungry birds gave me an opportunity to practice making bird portraits. One note of disclosure: the real birders would not dream of hanging out at a plastic feeder.