The Monarch Needs More Than Milkweed

Living on Earth
The past decade has seen steep declines of the Monarch butterfly populations. To save this iconic insect, many people have focused on protecting milkweed, the primary source of food for Monarch caterpillars across North America. Cornell biologist Anurag Agrawal recently studied the various drivers of the species’ decline, and tells host Steve Curwood that to save the Monarch, it will need more than just planting milkweed. (published May 6, 2016)