World Wildlife Fund (WWF)5d
Eastern monarch butterfly population nearly doubles in 2025
The population wintering in central Mexico's forests occupied 4.42 acres, up from 2.22 acres during the previous winter.
America’s butterflies are disappearing at a ‘catastrophic’ rate
US butterfly populations are declining because of insecticides, climate change and habitat loss, with the number of the ...
Butterfly populations declining rapidly in U.S. with 22% disappearing in 2 decades, study finds
A study, published Thursday in the journal Science, found that 22% of butterflies in the United States disappeared between ...
WTTW News1d
This Year’s Monarch Butterfly Count Rebounded From 2024 Crash, But Numbers Still Well Below Sustainable Target
The monarch butterfly population has rebounded from a near record low number in 2024, according to the latest annual survey ...
Monarch butterflies wintering in Mexico rebound this year
Monarchs from east of the Rocky Mountains in the United States and Canada overwinter in the mountains west of Mexico City.
ABC News5d
Monarch butterflies wintering in Mexico rebound this year
The number of monarch butterflies wintering in the mountains ... butterflies covered 4.4 acres (1.79 hectares) compared to only 2.2 acres (0.9 hectares) the year before. Last year’s figure ...
Voice of America3d
Monarch butterflies wintering in Mexico rebound this year
The number of monarch butterflies wintering in the mountains ... The highest number recorded was 1.2 million in 1997. The organization announced in February that it counted just 9,119 monarchs ...
KHON24d
Monarch butterflies wintering in Mexico rebound this year
MEXICO CITY (AP) — The number of monarch butterflies wintering in the mountains ... compared to only 2.2 acres (0.9 hectares) the year before. Last year’s figure represented a 59% drop from ...