The population of the eastern monarch butterflies in Mexico doubled this past winter season, according to a WWF survey.

The number of monarch butterflies wintering in the mountains west of Mexico City, rebounded this year, doubling the area they ...

What sounded like leaves rustling in the wind was the flickering wings of thousands of monarch butterflies as they flitted ...

FILE - A Monarch butterfly rests near a stream at ... branches in their winter nesting grounds in El Rosario Sanctuary, near Ocampo, Michoacan state, Mexico, Jan. 31, 2020. (AP Photo/Rebecca ...

MEXICO CITY (AP) — The number of monarch butterflies wintering in the ... experts said Thursday. The annual butterfly count doesn’t calculate the individual number of butterflies, but rather ...