I recall sitting outside a small motel in rural Arizona, probably near Wickenburg, many years ago. Some of the other guests and I were admiring the several species of hummingbirds tending the flowers. One oldtimer spoke up, saying that we ain't seen nothing yet. Seems there was a hummer that was not only larger but faster than any other known. Found right there in Arizona. Trouble is, it's so fast no one can see it. 100 miles an hour, maybe 200 miles an hour, no one knows because you can't see 'em. The oldtimer said he had secured the only known specimen. Yep, the normally sure-flying bird had made a bad turn. There he was, beak embedded 3 inches into the trunk of a ironwood tree!