By any measure, the revival of the bald eagle stands as one of the great environmental triumphs in conservation history. In ...

Monarch butterflies are poisonous to predators because of the chemicals in the milkweed they eat as caterpillars. In just the 9 to 14 days of the larval stage, a monarch caterpillar can grow to 2,700 ...

Monarch butterflies are beautiful backyard favorites—but they’re also toxic. Monarchs lay their eggs on milkweed plants, ...

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.

The annual migration of monarch butterflies is one of science's great mysteries: millions of monarchs know the correct path ...

Monarchs store some of the chemicals in their bodies, making them poisonous and unpalatable ... That cost may be worth it for monarch butterflies because the benefit of being noxious to predators ...

SALT LAKE CITY — The U.S. Fish and Wildlife Service said it is reopening the public comment period for a proposed rule to list the monarch butterfly as a threatened species under the Endangered ...

The plight of the monarch butterfly could cost farmers a valuable tool in the fight to protect crops from weeds and pests. An ...

Monarch butterflies are poisonous to predators because of the chemicals in the milkweed they eat as caterpillars. In just the 9 to 14 days of the larval stage, a monarch caterpillar can grow to 2,700 ...