Equinox: Life, Love, and Birds of PreyThe South Dakota winter gives a man time to think. One subzero morning, as Dan O'Brien approaches his fiftieth year, the autumnal equinox of his life, he takes stock. Feeling a waning sense of purpose, he decides to devote himself entirely, for the first time in his life, to his greatest loves falconry, his bird dogs, and the prairie he calls home. That summer he obtains a remarkable falcon chick who immediately distinguishes herself by her ferocity.