Monarch Butterfly Update: March 10, 2011 | ||||||||||
Waiting for signs of a mass migration—a grand exodus that could occur any day—Estela Romero found the sanctuary at El Rosario still butterfly-filled. The monarchs can't stay in Mexico much longer, but they can't move north too quickly either. This week, explore how seasonal change affects monarchs, and the timing of their spring migration. This Week's Update Includes:
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Image of the Week | |||||||||
"Within the month of March—a relatively short time—the monarchs will vacate their winter haunt and begin the recolonization of North America," says Dr. Bill Calvert. Estela Romero reports, "I decided to go to El Rosario Sanctuary this morning. I was astonished to see how full the sanctuary still is! It is too warm now for the monarchs to stay much longer. They must be leaving any time." What signs did Estela notice when she visited the sanctuary yesterday? What clues do her pictures reveal? All Eyes on Texas!
Will the first monarchs have been reported by next week at this time? South winds are predicted from Thursday through Sunday. Let's see if the south wind delivers our first northbound butterflies of spring 2011!
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"I was astonished to see how full the sanctuary still is!" wrote Estela Romero on Tuesday.
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Slideshow: Spring Migration, A Race Against Time | ||||||||||
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Maps and Invitation: Get Ready to Track the Migration! | ||||||||||
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The next Monarch Migration Update will be posted on March 17, 2011. | ||||||||||
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