Male, at first, mistaken for a Ruby-throated Hummingbird, but did not have a forked tail.
About 8 cm long
Feeding on nectar of an unidentified yellow flower that was about 3 cm long.
I was without a camera so I have provided a sketch
If you think this observation is inaccurate, please add an ID, participate in the quality assessment above, or describe the inaccuracy in a comment.