Brown-gray mono-plumage fused in groups of precision squadrons come screeching in from the south. We admire these aviators for the symmetry of their flight, the precision of their landing. Their sameness seems a self-chosen conformity. Humans see them through the lens of air show entertainment. We've had too many Blue Angel exhibitions. Birds, unlike our jet pilots, are genetically coerced. Birds make it look effortless because, for them, it is. They fly by instinct - by the radar of the genes, not by the seat of their pants or wits. Only mutations can change the pattern; only dissonance, disruption, and