Photo by Candace Fallon, The Xerces Society
Photo by Carly Voight, The Xerces Society.
Total monarchs reported and number of overwintering sites monitored for the Western Monarch Thanksgiving Count from Nov. 1997 to Dec. 2022.
The number of western monarchs present at overwintering sites is expected to decrease every year between Thanksgiving and New Years, due to a variety of factors. This year’s 58% seasonal decrease exceeds the typical range of 35–49% observed over the previous six winters. (Graphic: Xerces Society.)
Photo by Stephanie McKnight, The Xerces Society.