“Males have been observed and recorded to occasionally maim and kill honey bees, but they are no major threat to our primary agricultural pollinator,” Thorp said. “They do not aggressively seek out honey bees to do them intentional harm. The male wool carder bee merely defends its territory from honey bees and other flying insects to keep the area free of potential competitors that might interfere with its mating opportunities. This non-native bee has co-existed with honey bees in Europe for hundreds of thousands of years.”

A. manicatum appeared this past summer in our Haagen-Dazs Honey Bee Haven (the half-acre bee friendly garden planted next to the Harry H. Laidlaw Jr. Honey Bee Research Facility at UC Davis) but I have yet to see it maim or kill a honey bee,” Thorp said. “I am certainly not planning to recommend that we move our UC Davis Apiary from the area or take extraordinary means to protect our precious honey bees because of the presence of this relative newcomer. Nor would I recommend we attempt to control or get rid of the ‘newbie.’ It is another pollinator, males visit flowers for nectar and females visit for pollen and nectar.”

The wool carder bee is so named because the female collects or cards plant hairs from leaves for her brood nest, which she constructs in convenient cavities such as old beetle holes and hollow stems, Thorp said. The bee’s plant preferences include lamb’s ear (Stachys byzantine, in the mint family Lamiaceae), a perennial grown for its fuzzy, silvery gray-green foliage. It’s also been collected in the figwort/snapdragon family (Scrophulariacae) and the pea and bean family (Fabaceae), according to the Zavortink-Shanks research.

The bee is mostly black and yellow. The females, about the size of a worker honey bee, range in body length from 11 to 13 millimeters, while the males are 14 to 17 mm.

The females have specialized hairs on their face to gather pollen grains. The males, substantially larger, can be aggressive in defending their territory, sometimes body-slamming honey bees and other insects to the ground.

Thorp said the wool carder bee is easily transported “when we move plant materials around and it has been accidentally introduced to many areas of the globe. It entered and was established in New Zealand by January 2006 based on photos sent to me in February 2006 and verified by my former graduate student Barry Donovan (PhD, UC Davis, 1969) who held up publication of his Bees of New Zealand (Donovan 2007) to include this exotic species.”

The entire issue surfaced when the Sacramento resident wrote a letter on Jan. 10, 2011 asking that the Sacramento Municipal Utility District (SMUD) rescind its order to remove his small flower bed, which fronts a SMUD electrical transformer box in his front yard. He said he planted it 20 years ago and it is a research laboratory.

“My front yard driveway flowerbed is the only known location in the continental western United States, west of Missouri, where the European Wool Carder Bee has been found and reported to habitate,” he wrote in his open letter to SMUD officials, cc’ing UC and other scientists, state and county agricultural officials, Sacramento city officials, the Sacramento State Beekeepers' Association, and the news media. Describing himself as a retired entomologist, he wrote that “the new species of bee which I found may provide an answer as to why our European Honey Bees are disappearing.”

Since the broadcast and other published reports, Internet users have praised his "amazing discovery," applauded the "cause" of colony collapse disorder and called for interventions. Many are contacting the UC Davis Department of Entomology for consultation or more information.

“The story is being gobbled up by the general public due to all the media hype,” Thorp said. “I just had a UPS delivery guy ask me about “this new bee that is destroying our honey bees.”