Think of a monarch butterfly, and a distinctive image pops up: black-and-orange wings, with a sprinkling of white spots around the black edges. Those white spots may actually help monarchs complete ...

Monarch butterflies with more white spots on their mostly orange-and-black wings are more successful at long-distance migration. Some scientists... Monarch butterflies' white spots may help them fly ...

The white spots on a monarch butterfly's wings may help it migrate, according to a new study. (Pat Davis) Think of a monarch butterfly, and a distinctive image pops up: black-and-orange wings, with a ...

Monarch butterflies have distinctive orange-and-black wings with small white spots. And it's those spots that recently caught the attention of a group of scientists. As NPR's Nell Greenfieldboyce ...