What is rare cannot be seen without effort. Cannot be heard or touched without regret. Because it is the nearly lost, the nearly gone. In some ways it is like the shark that stays where the water is darkest and preys upon what it alone can see. This is the way with the rare. A white deer. A white-headed crow. One a symbol of long life, the other of death. It is difficult to tell why an absence of color should determine the fate of one over the other.