Yes, Elaine, there has been more than usual showing up over the past couple of weeks, so I'm pretty sure they must be migrating from up north. This is the busiest time of year at my feeders but I've never seen this many before, ever. Going through 12 or more cups of nectar per day at this point.
There is a usual crew that live in the nearby trees (The Hummingbird Condos
). Maybe the northern hummingbirds coming through have Time-shares.
It looks like September will be busy until they all move south which is usually the first week of October.
I'm looking out there right now and there is still a lot of activity going on. Wish I had some extra feeders to hang up... I'll have to go look around.