Mexico | Number of overwintering monrach butterflies down by more than 50%, NP agency reports

The number of monarch butterflies wintering in Mexico is down by more than half this year, according to new survey results.

The National Commission of Protected Natural Areas of Mexico, together with WWF-Mexico, local communities, and other partners, conducts a survey every year to document the extent of forest habitat covered by monarch butterflies that migrate from the US and Canada. The area of forest inhabited by monarchs in Mexican forests is used as a proxy for estimating the monarch butterfly population.

https://news.mongabay.com/2020/03/number-of-monarch-butterflies-wintering-in-mexico-down-by-more-than-half/