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StumbleUponPosts Tagged: Bombus melanopygus
Bumble Bees Apparently Not Parasitized
The three queen bumble bees (Bombus melanopygus) we found circling our porch lights the night on Jan. 9 appear to be fine.
Native pollinator specialist Robbin Thorp, emeritus professor of entomology at the University of California, Davis, cared for them at the Harry H. Laidlaw Jr. Honey Bee Research Facility from Jan. 9 through Jan. 22. Were they parasitized? Curious minds wanted to know.
We speculated that a parasitoid florid fly, Apocephalus borealis, which lays its eggs in bumble bees, wasps and honey bees, may have accounted for the strange behavior of the queens' "red-eye" flight. Were they "zombie" bees?
Result: No signs of parasitism. No sign of being "zombie" bumble bees. Nothing.
So this morning we released them back into their habitat. Two of the queens buzzed off immediately, while the third lingered. She foraged on the nearby pansies, considered a nuc box for her home, sipped some honey, buzzed back into the nuc box, foraged on some more pansies, sipped some more honey, and then buzzed back into the nuc box.
Her new home? Maybe.
However, we still don't know why the three bumble bee queens were buzzing around at night. We may never know.
Thorp said it best: "It was probably the Girls' Night Out."
Newly released queen bumble bee foraging on pansies. (Photo by Kathy Keatley Garvey)
A sip of honey to fuel her flight. (Photo by Kathy Keatley Garvey)
Queen bumble bee heads into the entrance of a nuc box, which may be her new home. (Photo by Kathy Keatley Garvey)
The Lovely Ladies at the Laidlaw
The three queen bumble bees (Bombus melanopygus) we found buzzing around our porch light the night of Jan. 9 are still very much alive.
Who would have "thunk?"
Native pollinator specialist Robbin Thorp, emeritus professor of entomology at the University of California, Davis, is caring for them at the Harry H. Laidlaw Jr. Honey Bee Research Facility on Bee Biology Road.
Thorp, who officially retired in 1994, maintains an active research and bee monitoring/identification program based as the Laidlaw facility. He recently co-authored a book on Bumble Bees of North America: An identification Guide (Princeton University Press), to be released in March.
So yesterday photographer/artist Allan Jones of Davis and I checked out "The Lovely Ladies at the Laidlaw." Yes, they're very much alive.
But it sure was strange on Jan. 9 to see them as as night fliers, or porch-light bumble bees. I figured they were parasitized. I figured that a florid fly, Apocephalus borealis, which lays its eggs in such insects as bumble bees, wasps and honey bees, had nailed them. I figured they'd be goners within a few days.
I hope I'm wrong.
It's long been known that Apocephalus borealis infests bumble bees. However, Professor John Hafernik of San Francisco State University and his colleagues caused quite a media stir when they discovered that this fly infests honey bees as well. They published their work, "A New Threat to Honey Bees, the Parasitic Phorid Fly, Apocephalus borealis," in PLOS ONE back in January 2012. They revealed that the parasitized, disoriented honey bees (which they nicknamed "Zombies" or "ZomBees") leave their hives at night and head for the lights.
"After being parasitized by the fly, the bees abandon their hives in what is literally a flight of the living dead to congregate near lights," said Andrew Core of the Hafernik lab. 'When we observed the bees for some time—the ones that were alive—we found that they walked around in circles, often with no sense of direction."
What's next?
Fingers crossed that the three queen bumble bees aren't parasitized. Fingers crossed that they will survive. Fingers crossed that they will continue to be "The Lovely Ladies at the Laidlaw."
The three queen bumble bees (Bombus melanopygus). (Photo by Kathy Keatley Garvey)
Bumble bee expert and UC Davis emeritus professor Robbin Thorp checks the trio. (Photo by Kathy Keatley Garvey)
'Zombie' Bumble Bees?
Or to put it more precisely, three Bombus melanopygus queens.
Early this morning, in between dark and dawn, three black-tailed bumble bees buzzed around our porch lights. Now, bumble bees don't venture out at night and they certainly don't head for porch lights--they head for flowers in the daytime--so immediately we're hypothesizing an infestation by the parasitoid phorid fly, Apocephalus borealis, aka "zombie fly."
We had earlier heard Professor John Hafernik of San Francisco State University discuss this fly at an entomological meeting in Sacramento.
The female flies lay their eggs in bumble bees, wasps and honey bees. Certainly not a nice thing to do. Eventually the eggs hatch into larvae and emerge from the dead host.
It was Hafernik who discovered that the "zombie fly" infests honey bees. He and his colleagues published their work, "A New Threat to Honey Bees, the Parasitic Phorid Fly, Apocephalus borealis," in PLOS One in January 2012. They revealed that the parasitized, disoriented honey bees leave their hives at night and head for the lights.
"After being parasitized by the fly, the bees abandon their hives in what is literally a flight of the living dead to congregate near lights," said Andrew Core of the Hafernik lab. 'When we observed the bees for some time—the ones that were alive—we found that they walked around in circles, often with no sense of direction."
Zombies. Or "ZomBees."
Hafernik and crew sounded the alert. They launched a citizen science project called ZomBee Watch, sponsored by the San Francisco State University Department of Biology, the San Francisco State University Center for Computing for Life Sciences and the Natural History Museum of Los Angeles County.
Fast forward to today...and the three bumble bees buzzing around our porch lights. That erratic, uncharacteristic, porch-light behavior prompted us to take them to native pollinator specialist/bumble bee expert Robbin Thorp, emeritus professor of entomology at UC Davis. Thorp is a co-author of the pending Bumble Bees of North America: An identification Guide (Princeton University Press).
It was he who identified them as Bombus melanopygus queens.
Thorp placed them in his "comfy" bumble bee-rearing chamber/observation box in the Harry H. Laidlaw Jr. Honey Bee Research Facility, provided nourishment (which the ladies accepted gracefully) and now it's wait-and-see.
Phorid flies? Nematodes? Something else? Nothing?
Don't know. However, as of 5 p.m. today, all three are alive.
"Just checked your three fuzzy ladies," Thorp reported. "They are still active and doing well."
In addition to carbohydrates, Thorp gave them a protein patty made by staff research associate/beekeeper Billy Synk, manager of the Laidlaw facility.
"I'll put in a pollen lump or two tomorrow," Thorp said, "to see if any are interested in becoming broody and starting a nest."
The "porch light" bumble bee. (Photo by Kathy Keatley Garvey)
A little nourishment for this queen bumble bee. (Photo by Kathy Keatley Garvey)
This is the bumble bee-rearing chamber/observation box that Robbin Thorp built. (Photo by Kathy Keatley Garvey)
Bumble Bee in Benicia
A journey to the Benicia (Calif.) Capitol State Historic Park, Solano County, on Christmas Day yielded the unexpected: a black-tailed bumble bee, Bombus melanopygus, foraging in jade blossoms.
Several honey bees and at least one lady beetle (ladybug), also discovered the "hot spot" in the garden as the temperatures climbed to 52 degrees.
A bumble bee in Benicia? On Christmas Day? Who would have thought?
This bumble bee species, identified by native pollinator specialist Robbin Thorp, emeritus professor of entomology at UC Davis, is one of only 250 species worldwide in the genus Bombus. It's native to North America.
Thorp is one of four co-authors of the newly published and long-awaited Bumble Bees of North America: An identification Guide (Princeton University Press). The book is billed as "the first comprehensive guide to North American bumble bees to be published in more than a century." It allows us to identify all the 46 bumble bee species found in North America, and also to learn about "evolutionary relationships, geographical distributions and ecological roles."
Lead author is Paul H. Williams, a research entomologist at the Natural History Museum in London. In addition to Thorp, other co-authors are Leif L. Richardson, a doctoral candidate in the Department of Ecology and Evolutionary Biology at Dartmouth College; and Sheila R. Colla, postdoctoral fellow at the Natural Sciences and Engineering Research Council of Canada and a project leader at Wildlife Preservation Canada.
Meanwhile, back to Benicia. Like North America's bumble bees, the Benicia Capitol has a rich history. Erected in 1852 and located at 115 West G St., it served as California's third seat of government. Legislators convened there from Feb. 4, 1853 (the year the honey bee was introduced to California) to Feb. 25, 1854.
Today, 160 years later, the Benicia State Capitol is the only surviving pre-Sacramento capitol. Let's hope we can still say that about bumble bees 160 years from now--and the years to come.
Black-tailed bumble bee, Bombus melanopygus, heading for jade blossoms. (Photo by Kathy Keatley Garvey)
Black-tailed bumble bee targeting jade. (Photo by Kathy Keatley Garvey)
A New Year and a First Bumble Bee
What an unexpected find!
It was the first day of 2013 and what did we see: a queen bumble bee, Bombus melanopygus, aka black-tailed bumble bee.
Like scores of others, we decided to take a walk on Jan. 1 in the Benicia State Recreation Area. Located in Solano County, just outside the city of Benicia, the 447-acre park on State Park Road offers a view of the Carquinez Strait amid lush grasslands, rocky beaches and a marsh filled with cattails about to lose their charm as they go to seed.
It's a good place to walk, run, cycle, and engage in picnicking, fishing, and bird watching.
And bee watching.
When the temperature hits 55 degrees, it's common to see honey bees foraging among eucalyptus, manzanita and wild mustard this time of year.
In mid-morning, Jan. 1, the temperature registered 50 degrees. No honey bees did we see. But as we stopped to admire the manzanita in the native plant garden, we spotted her: a black-tailed queen bumble bee, as later identified by native pollinator specialist Robbin Thorp, emeritus professor, UC Davis Department of Department.
"Yes, a queen of Bombus melanopygus, earliest of our bumble bees to emerge from hibernation and start nests each year," Thorp said. "I had heard that some were flying in December in the Bay Area. Keep an eye out for the first workers or first queens with pollen loads. Those will be the signs that nests have been established. Otherwise, seeing queens out on a nice sunny warm day, even sipping nectar, may mean that they are just stretching their wings and checking things out between naps, before getting down to the serious business of starting a new nest."
This species of bumble bee is native to western North America and is found from California to British Columbia and as far east as Idaho. "In the southern part of its range, the third and fourth segments of the abdomen are black instead of the red color seen in the northern populations, and this black color form was formerly known by the name Bombus edwardsii," according to Wikipedia.
Now it's Bombus melanopygus.
Soon we saw that we were not alone. Several other queen bumble bees quietly appeared, all to sip the sweet nectar of manzanita on the first day of 2013.
Soon we expect to see them with a load of pollen.
A queen black-tailed bumble bee, Bombus melanopygus, heading for manzanita blossoms. (Photo by Kathy Keatley Garvey)
Long tongue of the queen bumble bee, Bombus melanopygus, sipping nectar from manzanita. (Photo by Kathy Keatley Garvey)
Queen bumble bee, Bombus melanopygus, in flight. (Photo by Kathy Keatley Garvey)
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