Milkweed: a whole ecosystem on one plant. birdnote.org/listen/shows/milkweed-whole-ecosystem-plant Milkweed plants are important to Monarch butterflies, which depend on milkweed to raise their caterpillars. But Monarchs aren’t the only ones who benefit from milkweed. Scientists once documented hundreds of insect species they found eating some part of the common milkweed plant – including 132 species of beetles alone. When it’s part of a diverse community of plants, milkweed helps many species fi