The sounds of the unicorns rose from the canyon below them as the first signs of the new day appeared in the sky. (Walter Dean Myers, Shadow of the Red Moon, 1997) 5. Listen for sudden changes in the sounds that come -- or fail to come -- from conventional animals. An animal's alarm call might warn of a predator, while celebratory sounds, noncommittal murmurings, or eerie silence might signal the presence of a unicorn. Chapter One explores environmental changes in detail. Without further ado, let the adventure begin!