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

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 ...

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 ...

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 ...

The tags weigh just 60 milligrams — about three grains of rice. Researchers have tagged more than 400 monarchs this year and ...

By Claudia Steiner The monarch butterfly (Danaus plexippus) population has plummeted by 80% to 95% since the 1990s, depending ...

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, ...

This is an archived article and the information in the article may be outdated.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 ...

This is an archived article and the information in the article may be outdated.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This is an archived article and the information in the article may be outdated.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 first monarch ...

MISSION, Texas (Border Report) — Wearing dark sunglasses, long sleeves and a wide-brimmed hat, Florida retiree Linda Cooper ...

This is an archived article and the information in the article may be outdated.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 ...