Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar

TaxonomyBrowseInfoImagesLinksBooksData
Photo#408504
Diadasia bees on ground (near Ripiphorus sexdens wedge-shaped beetles) - Diadasia

Diadasia bees on ground (near Ripiphorus sexdens wedge-shaped beetles) - Diadasia
Santiago Oaks Regional Park, Orange, Orange County, California, USA
June 9, 2010
Layout: Clump of dessicated plants with beetles is a few feet left of a bench. To the right, a couple steps from the bench, is bare ground with a few holes in it. I saw a few bees nesting there a month ago, but not much was going on then and nothing seemed to be happening today. Maybe twenty feet farther to the right is a section of ground covered with dried vegetation. Above it were many bees - I assume male - going quickly back and forth a few inches above the ground in sort of a search pattern. Sometimes - not often - one would enter a hole. More often, they'd wait by the hole for a few seconds, then rejoin the squadron in the air. Female bees were eagerly jumped upon, and the coupling was both hard and fast.

There are lots of blooming plants in the area: mallow and mustard are prominent, but encelia and bindweed also abound, plus others in smaller numbers. I have seen a few small, fast bees inspecting the mallow, but none touched down in my presence. I suspect mallow-visiting Diadasia here, similar to what I uncovered last year at Nix Nature Center, at a bustling site I called table top town:


In this Santiago Oaks series, the establishing shot shows a single bee monitoring two holes.

Images of this individual: tag all
Diadasia bees on ground (near Ripiphorus sexdens wedge-shaped beetles) - Diadasia Bees on Ground (Near wedge-shaped beetles) - Diadasia Bees on Ground (Near wedge-shaped beetles) - Diadasia - male - female Bees on Ground (Near wedge-shaped beetles) - Diadasia - male - female Bees on Ground (Near wedge-shaped beetles) - Diadasia Bees on Ground (Near wedge-shaped beetles) - Diadasia

Great series, great information!
Poor bees with the beetles taking advantage of them!

 
An interesting bunch...and under seige on several fronts.
Next day, I found another colony a few hundred feet down the trail. Bee flies were inserting eggs into the holes, while what I think were Diadasia bees were attempting to fend them off.

Back at the site shown here, small bees or wasps were entering the holes, digging around near the top for few seconds (often still visible to me), then taking off. A few bee flies were also on the scene. I don't believe any Diadasia were present. I intend to post photos of the small guys, but don't have any decent shots. Well, better something than nothing.

Bravo!
A truly excellent series, my friend.

 
Thanks, Harsi
The males are a lot easier to shoot than the females, which I did at Nix last year.

Moved
Moved from ID Request.

Diadasia
note the beetle species Ripiphorus diadasiae

 
Beetle has been IDed as Ripiphorus sexdens Linsley & MacSwain
Here:

 
Diadasia are popular hosts among Ripiphorus
by 1951, they were known to host at least 3 spp. of Ripiphorus in CA(1)

 
Thanks, John, for all the bee IDs, this in particular.
Now I have some idea of why the beetle was of interest.

 
Dr. Ascher, could the bee be Diadasia bituberculata?

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.