- Author: Kathy Keatley Garvey
They look at us, and we look back.
But if you're Larry Snyder of Davis, an insect photographer and a retired musician, you not only look back, but you take their images.
Snyder does just that when he observes the insects at the city-owned North Davis Channel, the site of a former monarch-milkweed research project organized and directed by UC Davis professor Louie Yang. The site is also known as "the Covell drainage channel."
And now Snyder is sharing many of his images in a photography exhibit, "Insects at the Ditch," which opened Jan. 6 and continues through Feb. 2 at Logos Books, 513 2nd St., Davis.
The UC Davis research project began in December 2013 when Yang, a community ecologist, and his team planted narrow-leaved Asclepias fascicularis, at the site. Then they monitored the interactions of the monarchs, Danaus plexippus, on the plants from 2015 through 2017, culminating in the July 2022 publication of "Different Factors Limit Early-and Late-Season Windows of Opportunity for Monarch Development," in the journal Ecology and Evolution.
"I began watching, and then photographing, the insect life on the plants," Snyder related, adding that he became especially interested in insect behavior and interaction.
"It's my adopted back yard."
"I am grateful to the Bohart Museum of Entomology and its remarkable staff and associates for the frequent assistance in identification and understanding of life in the insect world." He has also shared his images with the Bohart Museum.
He directed the opera from 1976 to 2000. He also published a book, German Poetry in Song, in 1995. In 2001 he chaired the organizing committee for The Davis Star Show astronomy festival.
Snyder's last photography show (of 5x7 black and white contact prints) was at the old Davis Art Center in 1985. He recalls using a "5x7 Deardorff, one of those things resembling an accordion on stilts, rather unsuited for living macro subjects, and which I sold 25 years ago."
As the late E. O. Wilson said: "It's the little things that run the world."
(Editor's Note: The Bohart Museum, home of a global collection of eight million insects, is located in Room 1123 of the Academic Surge Building, 455 Crocker Lane, UC Davis. The Bohart Museum's next open house, themed "Social Wasps," is from 1 to 4 p.m., Saturday, Jan. 20. It is free and family friendly. UC Davis distinguished professor Lynn Kimsey, director of the Bohart, will share her wasp expertise.)
- Author: Kathy Keatley Garvey
If it's Friday, it must be "Friday Fly Day!"
And a perfect day to post an image of a fly.
This is a female tachinid, genus Peleteria, in the family Tachinidae. It is perched on a lavender in Vacaville, Calif. The genus is characterized by two prominent setae in front of the lower part of the eye.
I've seen tachinids lay eggs in monarch caterpillars and in monarch chrysalids. The fly larvae eat the host from the inside out. The hostess with the mostest?
However, tachinids are considered important biological controls because they lay their eggs in such pests as cabbage white butterfly larvae (Pieris rapae).
See the UC Statewide Integrated Pest Management website for more on tachinids.
Interesting critters, don't you think?
- Author: Kathy Keatley Garvey
You notice an egg on your milkweed plant, and watch its life cycle from egg to caterpillar to chrysalis. Aha, you think, soon I'll be able to see an adult monarch eclose from that chrysalis.
Not so fast.
If a tachinid fly lays eggs in that caterpillar or chrysalis, you'll get several tachinid flies, not a monarch. The fly larvae will eat the host--the caterpillar or chrysalis--from the inside out.
The tachinid fly is a parasitoid, and you can learn all about this parasitoid and many others at the Bohart Museum of Entomology's open house, Parasitoid Palooza, set from 1 to 4 p.m., Saturday, Nov. 18 in Room 1124 of the Academic Surge Building, UC Davis campus. It's free and open to the public and family friendly. A family craft activity is planned.
What's a parasitoid?
"An insect parasitoid is a species whose immatures live off of an insect host, often eating it from the inside out," said Tabatha Yang, education and outreach coordinator of the Bohart Museum of Entomology. "It is part of their life cycle and the host generally dies."
Among the presentations or topics:
- Bohart Museum senior museum scientist Steve Heydon, a world authority on Pteromalids, or jewel wasps, a group of tiny parasitoids.
- Entomology PhD student Jessica Gillung who researches the Acroceridae family "a remarkable group of endoparasitoids of spiders."
- Family craft activity is a pop-up card, featuring a monarch chrysalis and a fly, suitable for mailing to friends and family during the holiday season.
There are some 3,450 described species of Pteromalids, found throughout the world and in virtually all habitats. Many are important as biological control agents.
Members of the Acroceridae are "rare and elusive flies lay the eggs on the ground or vegetation, and the little larva is in charge of finding itself a suitable host," Gillung said. "Upon finding the host, the larva enters its body and feeds inside until it's mature to come outside and pupate. They eat everything from the spider; nothing is wasted."
Her dissertation involves "the evolution and systematics of Acroceridae, focusing on understanding host usage patterns and trends in morphological variation."
Tachinid flies, which lay their eggs in caterpillars and chrysalids, will be on display, along with the remains of its hosts. It is used as a biological control agent for some pests. But those who rear monarch butterflies consider it their enemy when it lays eggs in their caterpillars and chrysalids.
The late UC Davis entomologist Richard M. Bohart (1913-2007) researched Strepsiptera, or twisted-wing parasites, for his doctorate in 1938. Both the Bohart Museum and an entire family of Strepsiptera, the Bohartillidae, are named in honor of Professor Bohart.
The Bohart Museum, directed by Lynn Kimsey, professor of entomology at UC Davis, houses a global collection of nearly eight million specimens. It is also the home of the seventh largest insect collection in North America, and the California Insect Survey, a storehouse of the insect biodiversity.
Special attractions include a “live” petting zoo, featuring Madagascar hissing cockroaches, walking sticks, praying mantids and tarantulas. Visitors are invited to hold some of the insects and photograph them. The museum's gift shop, open year around, includes T-shirts, sweatshirts, books, jewelry, posters, insect-collecting equipment and insect-themed candy.
The Bohart Museum holds special open houses throughout the academic year. Its regular hours are from 9 a.m. to noon and 1 to 5 p.m. Mondays through Thursdays. The museum 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 by contacting (530) 752-0493 or emailing bmuseum@ucdavis.edu or Tabatha Yang at tabyang@ucdavis.edu.
- Author: Kathy Keatley Garvey
They're hairy. They're bristly. They're attention-getters.
They probably draw more "yecchs!" than most insects. All the more reason to love 'em.
Frankly, the tachinids (family Tachinidae, order Diptera) could never be misidentified as honey bees, as some pollinators such as hover flies, are. And yes, flies can be pollinators.
Entomologists tell us that worldwide, there are more than 8,200 identified species, and more than 1300 species in North America alone. Who knows how many more are out there?
The 2011 State of Observed Species (also called SOS), issued Jan. 18 by the International Institute for Species Exploration, Tempe, Ariz., lists 19,232 newly discovered species. Of that number, more than half--9,738--are insects. Those figures are already out of date. These newly discovered species were identified in 2009, the latest year statistics are available. It "takes up to two years to compile all newly reported species from thousands pf journals published in many languages," the SOS team says.
Check out the report, billed as "A Report Card on Our Knowledge of Earth's Species."
Who knows? If you're crawling around a flower bed, you might just discover a new tachinid.
- Author: Kathy Keatley Garvey
The parasitic fly (family Tachinidae) never had a chance.
It went from floral visitor to spider prey to spider dinner when it made a single solitary mistake: it inadvertently fell into a sticky web.
Its life-and-death struggle in our back yard did not escape a trio of cellar spiders (family Pholcidae). They rapidly descended on the squirming fly.
This was the first time I've ever seen cellar spiders hunt together. While one wrapped it in silk for future dining pleasure, another administered a fatal bite. The powerful poison paralyzed it. Then one of the bigger spiders tugged the wrapped prey under the lip of our barbecue table. Out of sight.
Bon appetit! Table for three!
It's not easy identifying "what's for dinner" but Martin Hauser, a senior insect biosystematist with the Plant Pest Diagnostics Branch, California Department of Food and Agriculture, said it's definitely a Tachinid fly. There are hundreds of Tachinidae genera, he says, but this one is very likely a Peleteria.
I'm just glad the catch of the day wasn't a honey bee.