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

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 there were 9 different colonies. The El Rosario Sanctuary in Michoacán contains 50.4% of the total population this winter. The press release is available in Spanish here. Read More »

Milkweed Yellows Phytoplasma

When it comes to milkweed, we still have a lot to learn, or at least I do! You may think that the only reason milkweed exists is to be a food source for monarch caterpillars. Well, I can tell you that there is a lot more going on in the milkweed patch than caterpillars munching away at your leaves; there are many interactions taking place. Read More »

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