SIERRA CHINCUA, Mexico (Reuters) - From a distance, they appear like autumn foliage: millions of endangered monarch butterflies blanketing trees in a kaleidoscope of brown, orange and black. As the ...

Eastern monarch butterflies once migrated to a wintering site in Mexico that spanned 45 acres of forest. Their population during the winter months has been on the decline for the last 25 years. Most ...

The number of monarch butterflies at their wintering areas in Mexico dropped by 59% this year to the second lowest level since record keeping began, experts said Wednesday, blaming heat, drought and ...

MEXICO CITYMEXICO CITY — The number of monarch butterflies at their wintering areas in Mexico dropped by 59% this year to the second lowest level since record keeping began, experts said Wednesday, ...

For the first time in California, citizen scientists can join the effort to track monarch butterflies thanks to Blu+, a new ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. MEXICO CITY (AP) — The first monarch ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. MEXICO CITY (AP) — The number of monarch ...

Picture yourself in a forest surrounded by a sea of fluttering orange, black, and white wings. The air is filled with the gentle rustle of millions of monarch butterflies. This is the amazing sight ...

MEXICO CITY — Mexican experts said Monday that 35% more monarch butterflies arrived this year to spend the winter in the country’s mountaintop forests, compared with the previous season. Experts say ...

MEXICO CITY (AP) — The first monarch butterflies have appeared in the mountaintop forests of central Mexico where they spend the winter, Mexico’s Environment Department said Saturday. The first ...

MEXICO CITY — The number of monarch butterflies wintering in the mountains of central Mexico dropped 22% from the previous year, and the number of trees lost from their favored wintering grounds ...