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

Scientists have successfully released dozens of butterflies closely related to the extinct Xerces blue, potentially restoring a vital link in the local ecosystem, according to the Washington Post.

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 ...

The proposal would designate as critical habitat parts of seven California counties where monarchs west of the Rocky ...

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