The Monarch Butterfly
The Monarch butterfly is common throughout North America and is known for its easily-recognized, bright orange wings. The population of the Monarch butterfly has been decreasing and recent studies suggest the possibility of extinction in the next 20 years.Illustration by Andy Roberson
Decreasing Numbers
The Monarch's dwindling population is especially apparent when they all gather together at their hibernation sites. Below, a chart shows the decrease in the amount of space these colonies occupy during the winter.Total Area Occupied by Monarch Colonies at Overwintering Sites in Mexico
Why Fewer Monarchs?
Monarch butterflies migrate to Mexico and California during the winter and hibernate in colonies until Spring. This long hibernation during which they are especially vulnerable could be one reason for their decrease in population. Another theory says it's because the Milkweed, a plant that the Monarch relies on throughout its life, is being killed by herbicide use and fewer Milkweeds are causing a decline in the Monarch population. Others say that fewer nectar sources is the cause for the population decline.
Monarch Migration
The Monarch butterfly travels further than any other butterfly (some say of any bug); some butterflies will fly over 3000 miles before arriving at their location. They will then hibernate through the winter and awaken in the spring to fly north and lay eggs.Click the button to see what path many Monarchs take on their migration.
Why Butterflies Matter
No matter the reason, butterfly extinction is a serious problem. Butterflies are the 3rd biggest pollinators, and help plants and flowers live. They are also considered good indicators of the health of an environment - the more butteflies there are in an area, the healthier the environment is considered to be. The table below shows butterflies in the United States facing threats to their species.
Click the arrows to sort the table, or use the search bar to find a certain species, status, or habitat. Click on the name of the butterfly to learn more about it or its status.
| Image | Name | Status | Habitat | Year Listed |
|---|---|---|---|---|
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