Monarch Migration Update: May 11, 1999
Today's Report Includes:
Today's Migration Map and Data
First Monarch Sighted in Minnesota!
A Second Migration is Now Underway
The sighting of a fresh monarch reminds us: The children of the Mexican monarchs should now be emerging in force. Watch carefully for these fresh monarchs of the next generation. Pay careful attention to the condition of the wings.
Even if you live in a southern region, and saw your first monarch weeks ago, please REPORT your first monarch of the next generation. Let's see if your observations reflect the increase in numbers we expect when the 1st spring generation emerges.
When and Where Offspring Are Emerging
Your migration map shows something you probably haven't thought about before. Each monarch sighting on your map actually represents many monarchs, more than were seen or reported. And these monarchs laid hundreds and hundreds of eggs in the areas marked on your map.
Let's estimate that it takes 30 days for a monarch egg to develop into an adult. Then 30 days AFTER each monarch sighting, many monarchs are probably emerging in that location. By simply changing the dates on the legend of your map by 30 days, you have a new picture: This map shows when and where monarchs of the next generation should emerge.
"Monarch Lab" Now Open and You're Invited
Dr. Karen Oberhauser has opened the doors to her monarch research lab:
You can get involved now by participating in the "Monarch Larval Monitoring Project", a citizen science
project involving volunteers from across the United States and Canada in monarch research. Your help is needed
in conducting weekly monarch and milkweed surveys.
Larval Taste Test
Discussion of Challenge Question #34
Last week Dr. Calvert asked how you might conduct a taste-test for monarch larvae. Here are research ideas from students in CT, PA and from Dr. Calvert himself:
Male vs. Female Monarch Behavior
Discussion of Challenge Question #32
Based on their need to reproduce, Challenge Question #32 asked how you think the behavior of male and female monarchs might be different.
Thanks to Dr. Karen Oberhauser for help in summarizing some of the differences listed here. Karen has studied the reproductive behavior of monarchs for 14 years.
Monarch Tracking Will Continue Through June--With Your Help
Even though the Journey North season ends on June 1, weekly migration data will be provided until the monarchs reach the end of the road.
However, WE CAN'T TRACK MIGRATION WITHOUT YOU!
Please help by sending your observations--even if by phone, FAX, or in
person. Each and every sighting is important, so please don't forget to
How to Respond to Today's Challenge Question
1. Address an e-mail message to: firstname.lastname@example.org
2. In the Subject Line of your message write: Challenge Question #35
3. In the body of your message, answer the question above.
The Next Monarch Migration Update Will Be Posted on May 18, 1999.
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