Crysler - We seldom see adults, only juveniles later on. Generally there are only one or two per year. It is very difficult to tell them apart from Short-billed but there are a few field marks including an under wing pattern difference. I saw that as well.
We have managed to plant a garden that attracts hummingbirds,bees and butterflies in our back yard.We have noticed a lot of juvenile Ruby-throated Hummingbirds but not many adult males.This guy is a bit scruffy but I was glad to get him.