Migration Update: April 17, 2008
Please Report
Your Sightings! >>

Today's Report Includes:

A Butterfly is Born >>

The Migration: Maps, Questions and Highlights

Map/Animation/Sightings

Cooler than normal temperatures and north winds have held back migration in the Central Plains.

Map Questions >>

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.
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! >>


Carol's grandson Sage of Poe Elementary in Houston, TX.

When Sage's monarch migrates north it could be the first monarch you see this spring!

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.

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. >>

 

 

 Links: Monarch Butterfly Resources to Explore
More Monarch Lessons and Teaching Ideas!

The Next Monarch Migration Update Will Be Posted on April 24, 2008.