MADISON, Wis. — U.S. wildlife officials announced a decision Tuesday to extend federal protections to monarch butterflies after years of warnings from environmentalists that populations are shrinking ...

The monarch butterfly population has declined in recent decades, leading to a proposed listing as threatened under the Endangered Species Act. People can help monarch butterflies by planting milkweed, ...

Thanks to tiny new ultralight radio tags small enough for a fragile butterfly to carry, scientists are getting a rare, real-time look at how western monarchs move through their winter habitat. It’s ...