"Three years ago, headlines delivered shocking news: nearly three billion birds in North America have vanished over the past fifty years. No species has been spared, from the most delicate jeweled hummingbirds to scrappy black crows, from a rainbow of warblers to common birds such as owls and sparrows. For the past year, veteran journalists Anders and Beverly Gyllenhaal traveled more than 25,000 miles across the Americas, chronicling costly experiments,...