Birds are unusually perceptive. As prey animals, they have to be. They are constantly on the lookout for predators.

Birds remain safest in a flock setting because there are many eyes on the sky and ground in a vigilant watch. If a single bird becomes alarmed for any reason, ALL birds will take to the air in fear.  Interestingly, this frenzied behavior sometimes occurs without a single alarm call being issued. The tension is FELT as clearly as any alarm call can be heard and is enough to set things into motion.

If we put that same perceptive species of animal into ...