Eastern monarch butterfly populations have declined by roughly 80% to 90% since the 1990s due to habitat loss, widespread pesticide use, and climate change.In the Northeastern United States, which serves as a vital breeding ground during the summer months, monarchs face specific pressures that threaten their multi-generational migration.Main Causes of DeclineLoss of Milkweed: The widespread use of herbicides in agriculture has wiped out native milkweed, the only plant monarch caterpillars eat.Pesticides and Insecticides: Agricultural chemicals and garden insecticides poison caterpillars and reduce the availability of safe flowering plants.Climate Change and Weather: Unpredictable spring and