Monarch Numbers from Mexico Point to Declining Population
The Xerces Society Blog: Monarch Numbers from Mexico Point to Declining Population
By Stephanie McKnight on 26 February 2021
The World Wildlife Fund–Mexico announced yesterday results of the annual survey of monarch butterflies overwintering in central Mexico. The butterflies occupied an estimated 2.1 hectares of forest during the winter of 2020–21. This was a reduction of approximately 26% compared to the previous winter, when monarchs occupied 2.83 hectares. Scientists estimate that 6 hectares are necessary to sustain the population. Read the rest of this blog here and read the original press release from the World Wildlife Fund.
