We had one hummingbird yesterday. I could tell it was a new visitor because it was going from one feeder to the next, just checking them out. Then it hovered in front of me for a few seconds, and decided my tube feeder was alright.
There was an unexpected visitor to the feeder this morning. He stayed there 5 minutes just enjoying himself. I was told the pepper flavored feed was unappealing to critters. This guy must enjoy the extra seasoning.