That's because they have an intimate friendship with the sounds unicorns make. As you concentrate with eyes closed and mind focused, you may detect the telltale song of the unicorn, announcing the presence of the venerable creature and beckoning you to begin your quest. When you open your eyes, the unicorn may not be immediately visible, but you'll know where to start looking. Hearing a unicorn requires time, patience, and "deep listening" skill on the part of the human,* and vocal projection on the part of the unicorn. Because we live in a highly visual world, we rarely exercise the full range of our hearing. Yet our ears can detect things that our eyes automatically neglect. By listening as opposed to looking, we can avoid overlooking. Practice can be richly rewarding, whether one is listening for unicorns in particular or neglected delights in general. This compact yet comprehensive guide will help you to identify the various calls of the mysterious unicorn as it frolics in its natural environment. Along the way, you will become better acquainted with unicorns' habits, eccentricities, antics, attitudes, and manners. Before you know it, encountering unicorns will become second nature to you, and you will have collected a treasure-trove of observations, anecdotes, snapshots, sketches, and memories for your unicorn scrapbook! * Needless to say, unicorns also communicate through dreams and via emissaries (as Mary Stanton notes in Unicorns of Balinor: Search for the Star, 1999), but that's neither here nor there.