Monarch Butterfly Update: March 24, 2011 | ||||||||||
Monarchs are pouring out of Mexico now, and the leading edge of the migration has already entered Oklahoma. Picture a trail of eggs 1,000 miles long, stretching from Michoacan to Oklahoma. What happens to all of those eggs? This week, explore the challenges monarchs face that can impact the growth of the population. This Week's Update Includes:
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Image of the Week | |||||||||
"I estimate only one quarter of the original number of monarchs remain at El Rosario," reports Estela this week. "I think the last massive exodus is taking place now." North of the overwintering region, observers suddenly began to report large numbers of monarchs heading northward last week. Find each of the following places using Google maps, then measure the distance and direction from the overwintering region:
Eggs on Milkweed
In Texas on Saturday, Mr. Aschen counted three dozen eggs. When he went back on Tuesday, he found 15 larvae but only one dozen eggs. Nearly a dozen were missing. Where did they go?
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Slideshow: From Eggs to Butterflies: How Does a Population Grow? | ||||||||||
The Migration: Maps and Journal Page | ||||||||||
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The next Monarch Migration Update will be posted on March 31, 2011. | ||||||||||
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