Cooperative Extension San Joaquin County
University of California
Cooperative Extension San Joaquin County

Posts Tagged: Danaus plexippus

Independence Day for a Monarch

The monarch chrysalis bulges, a sure sign that eclosure is imminent. At right is a newly formed green chrysalis. (Photo by Kathy Keatley Garvey)

Have you ever seen a monarch butterfly eclose? It's a magical moment. First an egg, then a caterpillar, then a chrysalis, and then a butterfly, Danaus plexippus. We took some images of a monarch eclosing back on Sept. 10, 2016. It was late in the...

Posted on Wednesday, July 4, 2018 at 10:54 AM
Focus Area Tags: Innovation Natural Resources

David James' Incredible Research on Migratory Monarchs

This male monarch, released by citizen scientist Steve Johnson of Ashland on Aug. 28, 2016, fluttered into Vacaville, Calif., on Sept. 5, a 457-kilometer  journey. (Photo by Kathy Keatley Garvey)

Newly published research by entomologist David James of Washington State University, Pullman, Wash., in the Journal of the Lepidopterists' Society yielded incredible news about the monarch population that migrates from the Pacific Northwest to...

On Flag Day, Both Flags and Monarchs Flutter

A majestic monarch butterfly, an icon, on an American flag. (Photo by Kathy Keatley Garvey)

Today, June 14, is Flag Day, a time when we celebrate and commemorate our American flag. Our Continental Congress adopted the "Stars and Stripes" as our nation's flag on June 14, 1777. Historians tell us that President Woodrow Wilson proclaimed June 14...

Posted on Thursday, June 14, 2018 at 4:33 PM
Focus Area Tags: Yard & Garden

A Monarch Kind of Christmas

Last year at this time, we saw four monarchs eclose in our small-scale rearing project. (Photo by Kathy Keatley Garvey)

Merry Christmas has always been merry, but it's better with butterflies! Isn't everything better with butterflies? Last year, in our small-scale monarch rearing project here in Vacaville, Calif., we saw one monarch eclose on Saturday, Dec. 24, one on...

Posted on Monday, December 25, 2017 at 6:00 AM
Tags: butterfly (1), Christmas (1), Danaus plexippus (37), holiday (1), monarch (3)

Are Western Monarchs Heading for Extinction?

A male monarch takes flight on Sept. 12 in Vacaville, Calif. (Photo by Kathy Keatley Garvey)

Are western monarch butterflies heading for extinction? A Sept. 7 article in Reuters, headlined "Monarchs in Western United States Risk Extinction, Scientists Say," indicated that "Monarch butterflies west of the Rocky Mountains are teetering on the...

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