Male Hummingbirds Woo Ladies With Tail-Song

Bird enthusiasts already know that male hummingbirds do impressive dives to excite potential lady-friends during mating season. But scientists have found that these dives may be more about sound than sight — it turns out that the rapid downward motion causes the male birds' feathers to vibrate, which makes a sound… » 9/13/11 3:55pm 9/13/11 3:55pm