Ann - My guess is that the increase in hummingbird numbers are juvenile birds that have recently fledged. Which is good because that means that you have at the very least 2 nesting females and each had 2 babies. Now they are coming to your feeders. My guess is that you have more than what you are seeing. Rule of thumb is to double the number of what you see to get an estimate of how many you may actually have.
The adult male(s) you are seeing could be the papa(s) or just birds on the move. Many times hummers have 2 clutches of babies. One in Spring and the other later in the Summer. Typically they are done with raising babies by early Fall and that's when they all start moving south for Winter.
Perhaps this is a very good year for hummers where there are more than usual having babies and are moving around?
The fact that I saw 2 birds at the same time in the middle of July is highly unusual here. It's a first! I am guessing that my two could be related since this Spring/Summer. Either way, it's cool to see more than ever before!
