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Old 02-06-2015, 03:40 PM   #1
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butterfly 2015 Population Update and Estimating the Number of Overwintering Monarchs in Mexico

2015 Population Update and Estimating the Number of Overwintering Monarchs in Mexico

Monarch Joint Venture
January 27, 2015

Quote:
Yesterday evening the eastern monarch butterfly population numbers were released to the public. The colonies measured an area of 1.13 hectares this year, up 69% from the record low population last year but still one of the lowest populations ever recorded. The monitoring, which was conducted by the National Commission of Natural Protected Areas (CONANP) in coordination with the WWF-Telcel Alliance, revealed that ...
Quote:
Estimating the Number of Overwintering Monarchs in Mexico

Contributors: Gail Morris, Karen Oberhauser, Lincoln Brower

Every year we wait impatiently for the monarch overwintering population count from Mexico. When are they done and how are the monarchs counted?

Monarchs go through four phases while overwintering in Mexico: their arrival, the establishment of an overwintering colony, colony movement and finally the spring dispersal. The first fall migrating monarchs usually arrive at the overwintering sites in late October through mid-November. In this early phase ...
2015 Population Update and Estimating the Number of Overwintering Monarchs in Mexico | News | News & Events | The Monarch Joint Venture
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