Cities Can Play Key Role in Saving Monarch Butterflies, Study Finds
Cities across the U.S., including Chicago, could supply up to about one-third of the milkweed needed to save monarch butterflies from extinction, according to a pair of new studies led by scientists at the Field Museum.
Conservation ecologists at the museum combined field research with high-resolution spatial images to map where milkweed already exists across large metropolitan areas, and where there is potential to add more. Milkweed is the only plant on which monarchs can lay their eggs.
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