Birds also chirp to indicate danger, warning, and communication. Mother birds use short chirps to keep tabs on their young while foraging ...
All of this, plus their speed is what makes these birds so wonderful to watch. With all that said, if hummingbirds don't really hum, what vocal sounds do they make to communicate with each other?
With smartphones distracting us, aircraft engines roaring and cars whizzing by, the background hum of modern living can drown out sounds ... watching birds is that almost anyone can do it with ...