Female Valley carpenter bees are solid black--except when they're foraging around passion flowers. Then they're black and yellow--the yellow being the color of the pollen transferred to their thorax.
Mary Patterson, one of the founding Häagen-Dazs Honey Bee Haven gardeners, planted a Passiflora (passion flower vine) along a fenceline of the bee garden several years ago to attract such insects as honey bees, carpenter bees and Gulf Fritillary butterflies (Agraulis vanillae). This is the Gulf Frit's host plant.
And the Passiflora does indeed attract them.
The Valley carpenter bees (Xylocopa varipuncta) were really mixing it up today during a Häagen-Dazs Honey Bee Haven Committee meeting.
The garden, installed in the fall of 2009, thanks to a generous gift from Häagen-Dazs to the UC Davis Department of Entomology and Nematology, is located on Bee Biology Road, west of the central UC Davis campus, next to the Harry H. Laidlaw Jr. Honey Bee Research Facility. It is open from dawn to dusk.
Check out the passion flowers. You'll find lots of insects passionate about them.
A Valley carpenter bee receives a brush of pollen. (Photo by Kathy Keatley Garvey)
Check out the yellow pollen on this Valley carpenter bee's thorax. (Photo by Kathy Keatley Garvey)
Honey bees frequent the passion flowers, too. (Photo by Kathy Keatley Garvey)