Federal wildlife officials on Tuesday moved to add the monarch butterfly to its endangered species roster, citing decades of steep population decline of the striking black-and-orange insect. The U.S.

An international team of scientists have identified nine new species of butterflies using a combination of geographical, morphological and molecular analysis. Subscribe to our newsletter for the ...

Adult monarch butterflies are large with bright orange wings, white spots and black veins and boarder. The U.S. Fish and Wildlife Service is recommending federal protections for the species as factors ...

The once-common orange-and-black butterflies have declined by 90% in recent decades, with the latest count showing the second smallest population on record, according to the Center for Biological ...

Durrell Kapan propped himself on his elbows to inspect a shrubby plant. He peered through a monocular in search of a sign that a pioneering experiment to restore something missing from these coastal ...

Researchers have shown that an Amazonian butterfly is a hybrid species, formed by two other species breeding together almost 200,000 years ago. Researchers have shown that an Amazonian butterfly is a ...

Every year, millions of monarch butterflies venture across North America – though in far smaller clusters than decades ago. Monarch populations have plummeted due to habitat loss, pesticide use and ...

Conservationists said a nationwide butterfly count has yielded disappointing results despite hopes that the record hot summer might have helped to offset decades of declining numbers. The Big ...

The Western monarch population has plunged more than 95% since the 1980s, and has a more than 99% chance of extinction by 2080. Western monarchs primarily spend winters along the California coast.