The last three days, I've had one sighting a day, and on two days, there were two. Tonight, I decided to watch in the hour before dusk to see how much activity there was. In one hour between 7:10 and 8:10 pm I had 7 visits, at intervals of from 1 to 12 minutes. There even was a chase, meaning there are at least two out there.

If you think you're not getting activity, check in the hour before dusk. If you're an early morning person, check in the hour after dawn. That's when they come in to stoke up after a long night, and at dusk to stoke up for the long night.