Conservation biology is an often-dismal discipline. For every story with a happy ending, there are hundreds with a tragic one – and often beyond that, thousands that end without us ever knowing. The loss of species that endear themselves to us is always a particularly difficult goodbye.
The monarch butterfly is swiftly approaching a sad fate. Robbed of its critical food supply (milkweed) by industrial agriculture in the midwestern region of North America, fewer monarchs are able to reproduce and migrate back down to its wintering habitat in Mexico. This year, surveys of Mexican forests have recorded the lowest number of returning monarch butterflies since these surveys began. The monarch migration is a fantastic spectacle; these butterflies migrate thousands of miles in spring and fall. Their large size and colorful markings make them familiar to most, and hence their declining numbers are likely to be noticed. That is the good news.
In this conservation case, everyone can help. Planting milkweed (the native species to North America, not tropical species such as Asclepias curassavica) in your front and back yard will help replace the feeding stations that the butterflies have lost with agriculture, and allow them to build up their numbers. Large populations help the butterfly persist through late springs (which disrupt their breeding schedule) and extreme weather events that can kill them outright.
For more information on monarch biology and how to help, you can visit the Monarch Watch webpage.