Browsing the "monarch butterflies" Tag

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Dr. James Hansen: The monarch butterflies return

Last summer the population of monarch butterflies in the Northeast United States seemed to be greater than it had been in the past decade. This was consistent with the fact that the number of butterflies making it to Mexico for the 2018-19 winter was the highest since 2006-07 (see graph). Unfortunately, only half as many […]

April 29th

James Hansen: A monarch butterfly resurgence?

In Quest of a Broken-Wing Butterfly I speculated in 2014 that the Monarch population may have fallen below a critical level.  We did not see more than a single Monarch on any day on our property.  The number of butterflies reaching the mountainous area in Mexico where they hibernate had fallen in the winter of 2013-14 to a […]

September 4th