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Migration
Update: April 17, 2008 |
Please
Report
Your Sightings! >> |
Today's
Report Includes:
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![](https://s3.us-east-2.amazonaws.com/journeynorth.org/images/graphics/tnail/monarch/eclose009_150_121.jpg)
A Butterfly
is Born >>
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The Migration: Maps, Questions and Highlights |
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![](https://s3.us-east-2.amazonaws.com/journeynorth.org/images/graphics/tnail/weather/2008/departure041208.gif)
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Map/Animation/Sightings |
Cooler
than normal temperatures and north winds have held back migration
in the Central Plains. |
Map
Questions >>
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Highlights:
Cold Holds Monarchs in Place |
Last
week's final blast of winter stopped the monarchs in their tracks.
"Temperatures dropped from the 70's and 80's down to the 50's
and 40's. Some people were sunbathing one day and shoveling snow
the next!" noted ornithologist David Aborn. Hummingbirds, whooping
cranes, songbirds, monarchs and other spring migrants waited out
the weather. Look how little the migration map changed in the Central
Plains, where most of the monarch population is poised to move northward!
The migration did inch forward on the map, finally advancing past
37N and moving into these 5 new states thanks to the single butterflies
that were reported there: Illinois, Kentucky, Virginia, Kansas and
Arizona. (Do you think the Arizona monarch came from Mexico or the
Pacific Coast? Either is possible! >>)
- Predict
where the monarchs will go next! Make your predictions
and record the results on this Prediction
Chart.
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Spotlight:
New Generation Emerging in Texas >> |
The
big news this week is that new butterflies of the next generation
are now being born in Texas! These young butterflies will join the
migration and continue the journey north in place of their parents.
The first was reported on Sunday, April 13th by Carol Cullar in
Eagle Pass.
"That
first fresh monarch of the season is always a surprise with the
intensity of colors and contrasts, after seeing worn and faded
critters for the winter," she remarked.
As
the calendar below shows, the Texas monarch completed the life cycle
in only 25 days. Across Texas, the first eggs were being laid at
the same time as Carol's, so watch for a surge in monarch numbers
in the days ahead.
Also,
Mike Quinn of Texas Parks and Wildlife is receiving reports of unusually
high numbers of larva in the Austin area. He sent this astonishing
picture of seven full-grown larvae on a single milkweed plant! >>
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![](https://s3.us-east-2.amazonaws.com/journeynorth.org/images/graphics/tnail/monarch/GenOne_HoustonPoeElmSage.jpg)
Carol's
grandson Sage of Poe Elementary in Houston, TX.
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When
Sage's monarch migrates north it could be the first monarch
you see this spring!
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Slideshow: New Replace the Old: The Journey North Continues
>> |
Spring is
a critical time for the monarch butterfly. Butterfly numbers are at their
lowest point. The generation from Mexico is dying and few butterflies
of the new generation are yet adults.
Monarchs
need good habitat in the spring when they return from Mexico in order
for their magnificent migration to continue. Butterflies lives are brief.
Now is the time when the new must replace the old.
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Challenge
Question #10: Where
Will the Next Generation Come From? >> |
The migration
map shows when and where monarchs have arrived so far this spring. You
can assume that female monarchs are laying eggs in those places, as long
as they have milkweed.
Challenge
Question #10:
- Which
states do you think are the most important for producing the next
generation of monarchs? Explain why.
>>
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Links:
Monarch Butterfly Resources to Explore |
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The
Next Monarch Migration Update Will Be Posted on April 24, 2008.
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