Monarch Migration Update: April 27, 1999
Today's Report Includes:
News from the Migration Trail
According to observations reported this week, the monarchs did not make a big surge northward. However, they are appearing in greater numbers where they've already been seen. Your map should still show the migration front at about 40 N latitude.
Worn and Tattered At the End of Their Journey
Robert Annette's observations yesterday in Hampton, VA suggest some monarchs from Mexico are still alive--and have traveled some 2,300 miles:
Have you ever wondered how monarchs find milkweed? After all, how long would it take you to find the nearest milkweed plant?
How Long Have These Monarchs Been Alive?
Discussion of Challenge Question #29
A long, long time, we realized last week! So we asked you to consider exactly how long it has been since these monarchs emerged. As students at Griswold Middle School in Rocky Hill, CT show, these monarchs' days are numbered:
"Monarchs born in Maine on August 20th would be 243 days (8 months) old as of April 20th, and monarchs born in Texas on October 20 would be 182 days (6 months) old as of April 20, 1999." (firstname.lastname@example.org)
The Final Days: Same for Males and Females?
With their lives quickly coming to an end, how will these butterflies pass their genes to the next generation? In your mind, carefully compare the needs of males and females:
As you make each list, look for similarities and differences between the two sexes. Then answer this question:
Watch the Wings: First Spring Generation Soon to Appear
Based on observations reported earlier this spring, many new monarchs should be on the wing by the first of May. When you see a monarch, be sure to look carefully at the condition of its wings. Are they faded and tattered, suggesting a monarch from Mexico? Or are the wings fresh and bright, suggesting a monarch of the first spring generation? Please include this information when you submit your field report.
Monarchs and Hummingbirds Race for the Border
Both species are now traveling across eastern North America, and nectar is needed to fuel both migrations. We'd like to know your opinion:
How to Respond to Today's Monarch Challenge Questions
1. Address an e-mail message to: email@example.com
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