- Author: Kathy Keatley Garvey
Have you ever seen an ambrosia beetle, a red turpentine beetle, an ice cricket, a brine fly or a sand wasp?
You will if you attend the UC Davis Bohart Museum of Entomology open house on “Extreme Insects: Fire and Ice,” on Sunday afternoon, Aug. 19.
The public event, to take place from 1 to 4 p.m. in Room 1124 of the Academic Surge Building, Crocker Lane, is free and family friendly. It will emphasize "fire and insects."
“There are a number of species that are specifically attracted by smoke to damaged trees,” said Lynn Kimsey, director of the Bohart Museum and professor of entomology at UC Davis. “Wildland fire fighters hate them because some of the beetles fly at them, crawling into their turnouts and biting them. Fire insects include jewel beetles, some horntail wasps and a few others."
In addition to fire insects, Kimsey said that the Bohart open house will cover other insects adapted to extremes:
- Ice: ice crickets and ice flies, both native to California
- Extreme acid: midges that live only in highly acidic mine run-off
- Hot water: midges found in hot springs just below the boiling point
- Salt: the brine flies of Mono Lake.
- Desert: sand wasps
Regarding the beetles that attack the firefighters, these are “The flatheaded borers (Buprestidae) and they will actually nip the firefighters as they land,” said chemical ecologist Steve Seybold with the USDA Forest Service, Pacific Southwest Research Station, Davis, and a lecturer/researcher with the UC Davis Department of Entomology and Nematology.
Insects that like ethanol/burned phloem include the red turpentine beetle, the ambrosia beetles, the "sour cambium" beetles, and some of the larger woodborers, Seybold said. “These are the 'undertakers' of the trees, if you will. Certain bark and ambrosia beetles specialize in colonizing burned tissue that gives off ethanol as a sign of fermentation. These insects wait until things have cooled off a bit before they bore into the trees."
"Often when you visit a burned area," Seybold said, "you'll see piles of white dust coming out of the trees that have blackened bark. This dust is made by ambrosia beetles--and other larger woodborers--that can make use of the carbon that is still present in these moribund trees. Ambrosia beetles 'consume' this carbon indirectly by farming fungi in their galleries. The fungus serves as a conduit for the nutrients in the wood. Some of the larger woodboring insects have other adaptations like specialized enzymes that degrade cellulose or hemicellulose."
Seybold called attention to an article titled “Attraction of Melanophila Beetles by Fire and Smoke,” authored by noted beetle expert E. Gorton Linsley (1910-2000) and published in April of 1943 in Scientific Notes, the Journal of Economic Entomology. Linsley, who received his doctorate from UC Berkeley in 1938, wrote that thousands of cigarette smokers at the UC Berkeley football games were complaining of beetles swarming into the stadium and biting their hands and necks.
The smoke on "still days sometimes hangs like a haze over the stadium during a big game," wrote Linsley, identifying the beetles as Melanophilaconsputa Lec. and M. acuminata (family Buprestidae). M. consputa is commonly called “the charcoal beetle.”
Linsley also reported receiving "complaints from sawmill operators, fire fighters and smelter plant workers regarding annoyance by buprestid beetles of the genus Melanophila. These beetles appear to be greatly stimulated by heat and attracted by smoke. They normally breed in fire-scarred pines and under ordinary conditions, they are rarely encountered in nature. However, on hot days during the dry season, especially in late summer and fall, they sometimes fly in unbelievable numbers to forest fires, burning refuse dumps, refineries, smelter plants, etc.”
Wildfires continue to rage in California. As of Aug. 13, the 5,255 California wildfires this year have burned 958,812 acres, according to the California Department of Forestry and Fire Protection and the National Interagency Fire Center. To date, the still-active Mendocine Complex fire, the largest wildfire in California history, has charred more than 344,000 acres.
The Bohart Museum open house also will include a family craft activity involving extreme insects. The museum houses a global collection of nearly eight million specimens and is the home of the seventh largest insect collection in North America, and the California Insect Survey, a storehouse of the insect biodiversity. It also houses a live "petting zoo" of Madagasar hissing cockroaches, walking sticks, tarantulas and praying mantids, and a year-around gift shop, stocked with T-shirts, sweatshirts, books, jewelry, posters, insect-collecting equipment and insect-themed candy.
The Bohart Museum's regular hours are from 9 a.m. to noon and 1 to 5 p.m. Mondays through Thursdays. It is closed to the public on Fridays, Saturdays and Sundays and on major holidays. Admission is free. More information on the Bohart Museum is available on the website or by contacting (530) 752-0493 or emailing bmuseum@ucdavis.edu.
- Author: Kathy Keatley Garvey
They brought home five gold or first-place awards: three silver or second-place awards; and two bronze or third-place awards. “That was quite a haul!” commented an ACE member on Facebook.
The recipients:
- Diane Nelson, College of Agricultural and Environmental Sciences, two golds
- Kathy Keatley Garvey, Department of Entomology and Nematology, one gold and one silver
- Jim Downing, California Agriculture journal, gold
- David Slipher, College of Biological Sciences, gold
- Steve Elliott, Western IPM Center, two silvers and a bronze
- Gregory Watry, College of Biological Sciences, bronze
Nelson wrote about pig personalities and polar bears. Slipher's topic was pigeons. (See other topics in the awards news story)
And me--bugs. The news story that won the gold (by yours truly) involved a visit to the Bohart Museum of Entomology by children of California migratory workers.
The piece, “Why These Youngsters Want to Become Entomologists” (https://bit.ly/2sYwhye) covered the children's tour of the insect museum, which houses some eight million insect specimens, a live "petting zoo" (Madagascar hissing cockroaches, walking sticks, tarantulas and praying mantids), and a year around-gift shop. The students engaged the director, Lynn Kimsey, professor of entomology at UC Davis, in a press conference. They asked the "who, what, when, where and how come" questions like pros. It was delightful to see them so well prepared and perceptive.
The Bug Squad blog that won silver (https://bit.ly/2BrePU5) involved a late-season monarch caterpillar that we found Oct. 27, 2017 on one of our milkweeds in our pollinator garden in Vacaville. It formed a chrysalis on Nov. 4.
On Day 19, Nov. 22 (the day before Thanksgiving), it happened. The monarch eclosed. A big, strong and healthy girl.
What to do...no way could she fly three hours in the rain and cold from Vacaville to an overwintering site in Santa Cruz. And with predators abounding, survival looked bleak.
From the Bug Squad blog:
"It just so happened that a friend and pollinator advocate, Rita LeRoy, the self-described 'farm keeper' at the Vallejo City Unified School District's Loma Vista Farm, was heading to Santa Cruz on Friday, the day after Thanksgiving, to show her out-of-town relatives the overwintering migratory butterfly sanctuary at the Natural Bridges State Beach Park. That's about a 100-mile trip from Vallejo.
"Could Ms. Monarch hitch a ride?
"She could. And she did."
Rita is a Monarch Mom (she rears and releases monarchs) and is active in the Bay Area-Based Pollinator Posse. She teaches Vallejo City Unified School District youngsters about farming, cooking and gardening. And that includes gardening for butterflies.
So Ms. Vacaville Monarch hitched a ride with Rita and her family.
"She flew so fast that we didn't get a picture of her flying away," Rita related. "She was anxious to join her new friends."
A happy ending.
And hopefully, Ms. Vacaville Monarch provided the butterfly world with another generation.
- Author: Kathy Keatley Garvey
The itsy bitsy spider climbed up the water spout.
Down came the rain and washed the spider out.
Out came the sun and dried up all the rain
and the itsy bitsy spider climbed up the spout again.
--Nursery Rhyme
It was an itsy bitsy spider.
But it wasn't climbing up a water spout.
It was lurking, waiting for prey, on our Mexican sunflower.
This particular crab spider was quite visible--white on orange. Sometimes they're so camouflaged that you have to look twice to see them. We remember the perfectly camouflaged crab spider on a gold coin flower (Asteriscus maritimus). (See below).
Crab spiders belong to the family Thomisidae, which includes about 175 genera and more than 2100 species. Wikipedia tells us that "The common name crab spider is often applied to species in this family, but is also applied loosely to many other species of spiders. Among the Thomisidae, 'crab spider' refers most often to the familiar species of 'flower crab spiders,' though not all members of the family are limited to ambush hunting in flowers."
- Author: Kathy Keatley Garvey
Just call it "my old flame."
Well, it's not mine, but it is a flame of sorts, a flame skimmer dragonfly (Libellula saturata) and it's firecracker red.
We see this species frequenting our pollinator garden in Vacaville, which includes a fish pond, flower beds, and bamboo stakes for their perches.
If you like dragonflies, you may want to purchase a dragonfly poster at the gift shop in the Bohart Museum of Entomology, located in Room 1124 of the Academic Surge building on Crocker Lane, UC Davis. It features 18 species of dragonflies, ranging from the common whitetail and green darner to the Western river cruiser and the bison snaketail. And, of course the flame skimmer.
The poster? It's the work of former UC Davis entomology doctoral candidate Fran Keller, now an assistant professor at Folsom Lake College, and naturalist/photographer Greg Kareofelas of Davis. Keller received her doctorate in entomology, studying with Lynn Kimsey, director of the Bohart Museum and professor of entomology at UC Davis.
- Author: Kathy Keatley Garvey
Bee-hold, the eye of a bee-holder.
When you have a "Bee Crossing" sign in your pollinator garden, odds are that bees will cross right in front of that sign.
And it's not always a honey bee.
European wool carder bees (Anthidium manicatum) zip around our blue spike sage (Salvia uliginosa), chasing other bees away and trying to save it for "their girls"--per chance to mate with them.
In the photos below, a male European wool carder bee paused to sip some nectar before continuing his rounds.
Little did he know, a honey bee (on the sign) was staring right at him.
As its name implies, the European wool carder bee, Anthidium manicatum, is a native of Europe. American entomologists initially detected his "immigrant ancestor" in the United States (New York) in 1963, and the species spread west. The carder bee (so named because the female "cards" fuzz from plants for her nest) was first recorded in California (Sunnyvale) in 2007.
