Here's everything you need to know about the butterflies' path through Texas. The journey north. Monarch butterfl ...

These late-blooming plants native to North America help feed butterflies — especially monarchs-— at a crucial point.

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 ...

Scientists have long known that milkweed cardenolides, which in most animals disable a vital sodium-potassium pump enzyme if they are absorbed into the blood, serve to make caterpillars and ...

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

It's hard to believe that milkweed has nearly disappeared from Vermont's landscape in just a few short years. In the Green Mountain State, corn crops are everywhere and along the edges of those fields ...

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 ...

Monarchs lay their eggs on milkweed plants and the young caterpillars feed exclusively on them. Butterfly conservationists encourage people to plant them where they can to promote monarch populations.