The monarch butterfly population in the eastern United States has declined sharply — an estimated 80% loss since the 1990s. Among the factors contributing to the decline: Loss of habitat, exposure to ...

Climate change and industrial agriculture have decimated the western monarch butterfly’s crucial food source, threatening the ...

Monarch butterflies are making their flight north after wintering in Mexico. Here's what to know about one of Earth's fascinating flyers in Michigan.

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

Breathtaking and resilient, the monarch butterfly completes one of the most astounding migrations in nature − a ...