That's pretty cool Suz, Black chinned are pretty rare in Florida, although there have been sightings. I have a hummer in my garden now that I just figured is male Ruby throat because sometimes the throat looks red and other times looks black, since it comes around so late, the lighting can be poor. Or do I have two and one is a black chinned and one a Ruby male???
I never see two at once. The Ruby throated males are usually here before the females each winter, but I saw one with a white throat the other day. Weather has been weird this year, so who knows. I only see Ruby throats as far as I know in my garden.