Hummingbird at the feeder

We have had a long hummingbird season this year. When advised that they were appearing in Maine toward the end of April, I managed to deploy a feeder. I anticipated few visitors since we barely had green foliage around the yard and no natural flowers to speak of. We got swamped with activity. It has been that way all year. I have two feeders and have to fill them every three or four days now.