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Danaus plexippus

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Editorial: Keeping the Monarchs in Our Glens

Monarchs have been steadily losing numbers—their average population in 2016 was estimated at 200 million, down 100 million from their historic numbers—but at this time they are not listed as endangered. There are two major reasons for their falling numbers: the loss of their primary food and egg-laying habitat here in the north, and the loss of their overwintering forests in Mexico.…