"Overall, it appears the fall migration of monarch butterflies is under imminent threat, even if the species' overall ...

This increase corresponds with increased plantings of nonnative milkweeds throughout the flyway. Many infected monarch ...

The increasing intensity and frequency of extreme heat likely compounds stresses on the iconic butterfly, worrying biologists ...

Out of 150 species of butterflies, monarchs are the most beloved, but what does the future hold for our friendly fliers?

There's more to the journey of monarch butterflies than you may know. Study this monarch migration map to see the route the ...

Scientists have learned that Monarch butterflies flying through Maryland, on their migration to Mexico, are not getting ...

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Many infected monarch caterpillars don't make it to adulthood. Those that do can't fly well and don't live long, possibly contributing to the fallout of butterflies along the migration path.

Many infected monarch caterpillars don't make it to adulthood. Those that do can't fly well and don't live long, possibly contributing to the fallout of butterflies along the migration path.