We've all seen them. They hover at the edge of your eyesight, waiting to be noticed, then they zoom away. Flowers with nectar attract them, and so do hummingbird feeders.
There are lots to choose from. If you only have a few hummingbirds, buy a small one so you don't have their favorite syrup going bad waiting for them.
At one time I had over 40 of them all waiting for their turn, while at the feeder there was one bird at each port, and one hovering over their shoulder. I went through a lot of sugar that summer!