Monarch population development in 2024: Part 3

28 June 2024 | Author: Chip Taylor

The expectations were low at the beginning of this breeding season. The overwintering numbers were the second lowest in the record (0.9ha), and it was reasonable to expect low numbers of monarchs to return from Mexico in March. It was ...

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Monarch Population Dynamics: Issues of scale

28 June 2024 | Author: Chip Taylor

By Chip Taylor and John Pleasants How big is the monarch population at the end of each breeding season? How many monarchs initiate the migration and how many successfully reach the overwintering sites in Mexico? The truth is, we don’t know ...

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Monarch population development in 2024: Part 2

23 May 2024 | Author: Chip Taylor

Introduction The report that follows is a rough attempt to assess the prospects that the monarch population will recover from the historically low number of hectares recorded for all the overwintering sites last winter (0.9ha). As you may recall, in Monarch ...

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Monarch population development in 2024: Part 1

2 April 2024 | Author: Chip Taylor

As most of you reading this know, the estimate of the number of monarchs overwintering in Mexico this past winter was a mere 0.9hectares, the second lowest in the record that began in 1994. Low numbers have again triggered concerns ...

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Is the eastern monarch population continuing to decline?

29 March 2024 | Author: Chip Taylor

Introduction The question posed in the title is important. Evidence of a continuous decline could lead to regulations and restrictions in accordance with the Endangered Species Act (ESA) while evidence of stable numbers would indicate that regulations are unwarranted. In fact, ...

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