Posts Tagged: Danaus plexippus
If you think people don't care about monarch butterflies, think again.
A recent survey published in Conservation Letters showed that Americans are willing to spend at least $4.78 billion to help conserve monarchs (Danaus plexippus), one of the most recognizable of all insects. Indeed, what is more spectacular than the multigenerational migration of monarchs heading from their breeding grounds in northern United States and southern Canada to their wintering grounds in central Mexico and coastal California?
The study of 2,289 U.S. households, led by Jay Diffendorfer of the U.S. Geological Survey, Geosciences and Environmental Change Science Center, Denver, found that we Americans love monarchs so much that we're more than willing to plant milkweed, their larval host plant, to save them.
The article, published Oct. 28 and titled National Valuation of Monarch Butterflies Indicates an Untapped Potential for Incentive-Based Conservation, calls attention to the destruction of the monarch's habitat and the importance of conservation.
"Since 1999, the size of the overwintering colonies in Mexico and California have declined, and the 2012 survey in Mexico showed the lowest colony size yet recorded, which prompted wide-scale media reports," the authors wrote. "Habitat loss in the overwintering sites in Mexico and California is well-documented, although no direct empirical link between declining overwintering habitat and monarch numbers exists. In addition, the growing use of glyphosate-tolerant genetically modified crops has reduced larval host plant (milkweed, Asclepias spp) abundances in farm fields across United States and Canada. Increasing acreage of glyphosate-tolerant corn and soybeans are negatively correlated to monarch numbers, with the area of milkweed in farm fields in the United States declining from an estimated 213,000 to 40,300 ha."
Biologist Hugh Dingle, emeritus professor of entomology at UC Davis, is among those studying their migration. (Read his quotes in the National Geographic cover story, "Mysteries of Great Migrations," published in November 2010. Dingle is now working on a much-anticipated book on migration from his headquarters in the Sharon Lawler lab, UC Davis Department of Entomology and Nematology.
Butterfly expert Art Shapiro, distinguished professor of evolution and ecology at UC Davis, monitors butterflies in Central California. Here's what he has to say about monarchs on his website, Art's Butterfly World.
Meanwhile, a day before Conservation Letters published the survey, a lone monarch butterfly fluttered into our backyard to sip nectar from lantana. It lingered for 10 minutes.
What a treat to see!
A monarch butterfly on lantana last week in Vacaville, Calif. (Photo by Kathy Keatley Garvey)
Monarch taking flight. (Photo by Kathy Keatley Garvey)
It happened so quickly.
The monarch butterfly (Danaus plexippus) fluttered to the lantana for a sip of nectar when the unexpected happened.
A praying mantis, lying in wait, leaped high and grabbed it by its wings.
Unable to fly, the monarch struggled to right itself. The praying mantis kept its viselike grip.
At the time, I was focusing on the butterfly and didn't see the predator. When I saw the butterfly struggling, I walked over to it and lifted it out of the lantana, only to find a praying mantis attached to it.
The butterfly did not make it. The praying mantis, a female about to lay eggs, did. She will be shown at the Bohart Museum of Entomology's open house on Saturday, Sept. 21 from 1 to 4 p.m. and then released.
Theme of the Bohart open house is "Live at the Bohart!" Live? That's because the open house will feature live insects, such as cabbage white and Gulf Fritillary butterflies, Madagascar hissing cockroaches, walking sticks, a rose-haired tarantula and a “Harry Potter bug,” which is an amblypygid commonly known as a whip spider or tailless whip scorpion.
The Bohart, located on the UC Davis campus in Room 1124 of Academic Surge on Crocker Lane, formerly California Drive, is home to nearly eight million insect specimens, collected throughout the world.
At the open house, museum officials will tell you how to rear a cabbage white butterfly and other butterflies, such as Gulf Fritllaries. You can talk insects with director Lynn Kimsey; senior museum scientist Steve Heydon; public education/outreach coordinator Tabatha Yang, and others. The gift shop will be open for the purchase of t-shirts, jewelry, posters, books, insect nets and other items.
As for the praying mantis, on Saturday she will be freed to catch more prey.
Let's hope it is a cabbage white instead of a monarch./span>
A praying mantis leaps at a fluttering butterfly. (Photo by Kathy Keatley Garvey)
With its viselike grip, the praying mantis holds on to its prey. (Photo by Kathy Keatley Garvey)
The praying mantis tightens its grip. (Photo by Kathy Keatley Garvey)
The monarch, mangled from its encounter with the praying mantis, didn't make it. (Photo by Kathy Keatley Garvey)
The mighty Monarch butterfly and the industrious honey bee.
How rare we see them together on the same flower.
But that was the case last Friday at the Häagen-Dazs Honey Bee Haven, a half-acre bee friendly garden planted next to the Harry H. Laidlaw Jr. Honey Bee Research Facility at the University of California, Davis.
The butterfly touched down on a brilliant orange Mexican sunflower (Tithonia) and began nectaring. A honey bee crawled up the petals. So there they were, sharing nectar. They saw one another. They acknowledged one another. And they ignored one another.
Finally, the bee buzzed off to forage on her very own Mexican sunflower.
It was a butterfly-bee moment. Or more technically, a Danaus plexippus/Apis mellifera moment.
Two may be company, but sometimes it's best to get your own flower.
Monarch butterfly watches as a honey bee crawls up a Mexican sunflower. (Photo by Kathy Keatley Garvey)
Bottoms up! A honey bee makes herself at home. (Photo by Kathy Keatley Garvey)
Two's company--a Monarch butterfly and a honey bee share nectar from the same flower. (Photo by Kathy Keatley Garvey)