“Plight of the Monarch,” a new 22-minute documentary by fine art photographers Cindy and Kirby Pringle, looks the crucial role milkweed plays in the lifecycle of the monarch butterfly. Because milkweed is disappearing ? it is being mowed and sprayed by herbicides ? so is the monarch butterfly. The reason is simple, but not so easily solved: loss of habitat. The butterfly needs milkweed to survive and when milkweed disappears ? so will the monarch.