But the feeders around the agave this evening (and you can see their shapes in the photo above) are often mistaken for hummingbirds. In fact, they are Pink Spotted Hawk Moth, and they seem to think the nectar in this century plant, (which will die, now that it's bloomed) is pretty darned tasty. The hawk moth, along with the hummingbird, and some species of bats, are the only animals to have perfected hovering flight. (I learned that on Wikipedia!).
One amazing thing about this plant, is that center "stalk"... when we left on our 7 week road trip, it wasn't there! It shot up to its current height, which I'd estimate at 18-20 feet in just 50 days. And when it dies, it will do so suddenly, just falling over. Unfortunately the two agaves sit next to where the motor home is parked. Timber-r-r-r!