After many years of feeding birds in my backyard, I saw my very first hummingbird. What a thrill to photograph these little critters. Knowing nothing about hummingbirds, I'm asking my forum friends to please tell me what species this little guy might be.
Maybe a female Rufous Hummingbird, Selasphorus rufus.
Then again it maybe a female Female Broad-Tailed Hummingbird which are in Colorado.
found on here, scroll down.