Even though we have more than a dozen hummingbird feeders around the property, the hummers love the test tube. It is their favorite feeder. We've even seen three hummers feeding together at the test tube at the same time.
You can read more about the Rufous Hummingbird in the Backyard Birds section including a story about a Rufous Hummingbird with a bee on it's beak.
Check out the links to the Anna's Hummingbird and the Broad-tailed Hummingbird where you can read about them and watch videos of them.