Monarch caterpillars eat 200 times their weight in milkweed and can devour a whole leaf in less than 5 minutes. Monarch butterflies are poisonous to predators because of the chemicals in the milkweed ...

Monarch butterflies are making their flight north after wintering in Mexico. Here's what to know about the fascinating, fragile traveler.

The monarch butterfly population ... and it’s true that their caterpillars dine exclusively on the leaves of these plants. Adult monarchs, however, will eat from a wide array of nectar plants ...