Hummingbirds a year ago...

We 🙋‍♀️😺 have been in this location 4 years. Every year, I've had Humming bird feeders (2 out front 1 in back).
The one's out front have been the busiest and this little feeder in back, not so much.

This year there is hardly any Hummingbirds out front so no reason to put this little feeder up out back. What happened to all of them?

Have a very blessed day!