It's always been a dream of mine to walk through the woods and be able to hear birds calling in alarm to alert each other of my presence.
An amazing new study from a man at the University of Washington, has decoded chickadee-chirping to the extent that he can tell what they are harping about.
He put all sorts of predators in the realm of chicadees and listened to their calls. Apparently, the higher the level of danger, the more "dee"'s were elicited from the birds.
"The biologists also found that the more dees in an alarm cry, the larger the mob of other chickadees that formed to attack the intruder and the closer they approached in their attacks."
Ever so slightly more information at Discover .