Monarch populations have been declining since the mid-1990s, according to annual counts taken at the butterfly’s wintering grounds in high-altitude oyamel fir forests, mostly in the Mexican ...

Mexico's monarch migration arrived late this year but in greater numbers, say caretakers at the Monarch Butterfly Biosphere ...

EPA must better assess the dangers of pesticides, especially in monarch breeding habitats in state’s Central Valley.

While wasps are also important to the natural environment, their predation on monarch butterfly caterpillars ... While adult wasps feed on nectar, the baby wasps or larvae need protein to mature ...

The U.S. Fish and Wildlife Service proposed Tuesday adding the iconic monarch butterfly to its list of federally endangered species. Public comments will be accepted through mid-March on the ...

The U.S. Fish and Wildlife Service’s proposed protection of the monarch butterfly as threatened under the Endangered Species ...

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 federal agency wants the monarch butterfly listed as “threatened” under the Endangered Species Act, with specific protections and flexibility to encourage conservation, it recently announced.

Monarch butterfly numbers in Pacific Grove have drastically decreased this season, causing concern among scientists and conservationists. The Pacific Grove Museum of Natural History reports low ...

The monarch butterfly population continues to shrink due to factors such as climate change. People working to help the ...