AREA OF FOREST OCCUPIED BY THE COLONIES OF MONARCH BUTTERFLIES IN MEXICO, DURING THE OVERWINTERING PERIOD 2024-2025

During the 2024-2025 overwintering season, monarch butterfly colonies in Mexico occupied 4.42 acres of forest, marking a 99% increase from the 2.22 acres recorded in 2023-2024. Eight colonies were identified: three within the Monarch Butterfly Biosphere Reserve (MBBR) covering 3.01 acres and five outside the MBBR covering 1.42 acres. The largest colony was found in ejido El Rosario, Michoacán (2.46 acres), while the smallest was in San Andrés (0.005 acres).

• In the 2024-2025 overwintering season, eight monarch butterfly colonies occupied a total of 4.42 acres of forest, which is a 99% increase compared to the 2.22 acres recorded during the 2023-2024 winter.
• Of the total area occupied, 3.01 acres were located within the Monarch Butterfly Biosphere Reserve (MBBR) across three colonies, while 1.42 acres were occupied by five colonies located outside the MBBR.
• The largest individual colony was located in ejido El Rosario, Michoacán, covering 2.46 acres, and the smallest was in San Andrés in the Los Azufres sanctuary, covering 0.005 acres.
• The colony at Atlautla, situated outside the Monarch Region and adjacent to the Iztaccíhuatl - Popocatépetl National Park, occupied 0.24 acres.
• Historically, the 2023-2024 winter recorded the second lowest area of occupation in 30 years (2.22 acres), with the lowest historical record occurring in 2013-2014 (1.65 acres) and the highest in 1996-1997 (44.95 acres).

APA

E., R.-S., FERNÁNDEZ-ISLAS, A., CRUZ-PIÑA, M., MONDRAGÓN-CONTRERAS, G., & MARTÍNEZ-PACHECO, A. (n.d.). AREA OF FOREST OCCUPIED BY THE COLONIES OF MONARCH BUTTERFLIES IN MEXICO, DURING THE OVERWINTERING PERIOD 2024-2025. WWF International. https://www.worldwildlife.org/documents/1087/895sxc8y98_WWF_MonarchButterflySurveyResults_2024_2025_English_Acres.pdf

Chicago

E., RENDÓN-SALINAS,, A. FERNÁNDEZ-ISLAS, M. CRUZ-PIÑA, G. MONDRAGÓN-CONTRERAS, and A. MARTÍNEZ-PACHECO. AREA OF FOREST OCCUPIED BY THE COLONIES OF MONARCH BUTTERFLIES IN MEXICO, DURING THE OVERWINTERING PERIOD 2024-2025. WWF International, n.d. https://www.worldwildlife.org/documents/1087/895sxc8y98_WWF_MonarchButterflySurveyResults_2024_2025_English_Acres.pdf.

Wikipedia

{{cite report |last1=E. |first1=RENDÓN-SALINAS, |last2=FERNÁNDEZ-ISLAS |first2=A. |last3=CRUZ-PIÑA |first3=M. |last4=MONDRAGÓN-CONTRERAS |first4=G. |last5=MARTÍNEZ-PACHECO |first5=A. |title=AREA OF FOREST OCCUPIED BY THE COLONIES OF MONARCH BUTTERFLIES IN MEXICO, DURING THE OVERWINTERING PERIOD 2024-2025 |publisher=WWF International |url=https://www.worldwildlife.org/documents/1087/895sxc8y98_WWF_MonarchButterflySurveyResults_2024_2025_English_Acres.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{endarea, author = {E., RENDÓN-SALINAS, and FERNÁNDEZ-ISLAS, A. and CRUZ-PIÑA, M. and MONDRAGÓN-CONTRERAS, G. and MARTÍNEZ-PACHECO, A.}, title = {{AREA OF FOREST OCCUPIED BY THE COLONIES OF MONARCH BUTTERFLIES IN MEXICO, DURING THE OVERWINTERING PERIOD 2024-2025}}, institution = {WWF International}, url = {https://www.worldwildlife.org/documents/1087/895sxc8y98_WWF_MonarchButterflySurveyResults_2024_2025_English_Acres.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }