Each July, along the dappled stream banks of Kodiak Island, just off the Alaska coast, a weedy looking wildflower produces a few dark-blue hooded blossoms. There is nothing particularly memorable about the appearance of Aconitum delphinifolum. Its leaves are thin and rather spiky. Its scrawny-looking stem cannot hold the weight of its flowers: its neighbors keep it upright. But this eminently forgettable looking plant, a member of the buttercup family, possesses a dark secret. Aconitum delphinifolum contains a toxin capable of killing one of the world’s largest animals, a 40-ton humpback whale. Indeed, the local Alutiiq people have long understood this: their whalers once enlisted it as a lethal weapon.
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Photo: Humpback whales, NOAA Sanctuary collection, Dr. Louis Herman