The U.S. Fish and Wildlife Service on Tuesday proposed to add the monarch butterfly to the threatened species list.

The western monarch population has declined more than 95% since the 1980s, according to research from the Xerces Society for ...

New butterflies and moths, that have just emerged from their metamorphosis, are released into their new habitat, allowing the ...

U.S. officials decided to extend protections to monarch butterflies after warnings from environmentalists that populations ...

For more than 50 years, the ESA has been an effective catalyst for on-the-ground collaborative conservation, promoting the ...