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Photo#296359
It's Alive!! - California Yellowjacket  - Vespula sulphurea - female

It's Alive!! - California Yellowjacket - Vespula sulphurea - Female
Webb Canyon , ~2000 ft. altitude, Los Angeles County, California, USA
June 28, 2009
Size: ~13 mm
Those of you who may recall my initial post for V. sulphurea from last year, will know just how happy it makes me to be able to finally post these new images. Since my last post, I have been dutifully scrutinizing every one of the abundant V. pensylvanica population around my place with ever high hopes of another sighting, but kept coming up dry. Then, yesterday, as I approached the pool to do some "rescue work", I saw this yellowjacket clinging to the metal hand rail. Even from quite some distance, I could make out the bold, yellow, parallel markings and as a wide grin spread across my face, I repeated "Please, don't fly away..." under my breath as I fumbled to get my camera out. Although the wasp seemed to be in good shape, I think it must have been recovering from at least a brief dunk in the pool as it was extremely preoccupied with grooming itself and there was noticeable detritus still clinging to parts of its body. Perhaps for this reason, it allowed me to get my lens ridiculously close and didn't seem in the least bit bothered by my activities. After getting a good number of shots, I actually coaxed it to climb off the railing onto the more pleasing set-up you see in this photo, where it remained for a few more pictures before flying off to wherever its next destination might be...

I believe from studying the drawings on the Discover Life website, that this is a female, but would love to have confirmation from someone more familiar with the Hymenoptera.

Mixed oak & chaparral habitat.

Images of this individual: tag all
It's Alive!! - California Yellowjacket  - Vespula sulphurea - female It's Alive!! - California Yellowjacket  - Vespula sulphurea - female It's Alive!! - California Yellowjacket  - Vespula sulphurea - female It's Alive!! - California Yellowjacket  - Vespula sulphurea - female

Thank you very much
for sharing these! These are WONDERFUL live shots too. That is a male and a worker now. Keep up the great work, and do let us know if you stumble across a colony

The body and build of this wasp do resemble that of V. germanica.

How could I have goofed
so much...You're right, Harsi this is a worker, at least based on comparison (payin' attention this time) with illustrations at DiscoverLife.

 
Revisiting the queen issue...
Wanting to get as much input as I could, I went ahead and e-mailed Bob Jacobson to ask if he would venture to offer his opinion on these images. His comments to me via personal communication were as follows:

"Many species of Vespula can be tricky to sex from photos if there is no scale, but I will do my best! Color patterns (such as those shown in the drawings adapted from Miller's publication) are variable in most of the species including V. sulphurea, so it is possible to find workers resembling the drawing of the queen and vice versa. To make it more complicated, intermediate females are sometimes encountered!

I believe your first photo (#296359 and the three accompanying it on the same link) is of a queen, and the main reason I say that is that the yellow markings on T-1 are a bit "irregular" which is much more likely in a queen; workers almost always have a much smoother yellow band on the apical margin. The yellow propodeal spots are consistent with what I have seen on queens. Although somewhat subjective, there appears to me to be a certain depth of color that suggests a queen. Although the date (June 28) is rather late for a queen, I have collected them about a week earlier so it is still possible to see one that late."


[My most sincere thanks to Bob for his time and input on this matter.]

A beauty, Harsi!
It does look like a queen, though the median maculations are a bit more elaborate than in Grace Chen's illustration at Discover Life, probably varies.
Oh, what's the actual length?

 
Dazzled by royalty...
I must admit that I was a bit overwhelmed in my excitement and I neglected to take any measurements. However, the little red piece of rock that she's resting on in this shot is still out by the pool and I can go measure that today and come up with a pretty good estimate based on my photos. (Thanks for pointing out that important piece of missing information, Hartmut! I would assume that the male would measure slightly longer than this female, and if you're interested you can see that data here.)

 
Finally got around to figuring out the size...
...which turned out to be about 13 mm. As I suspected, somewhat smaller than the male I photographed previously.

Wonderful! Great find, Harsi.
You own the Bug Guide franchise for this one. Nice shots, too.

 
I second that!
I still have an old queen specimen from extreme southern Oregon, collected about 1982....They are so dazzling compared to the other species out west. Nice work. Yes, she is a female, possibly even a queen rather than a worker.

 
Thanks Ron & Eric!
I seriously should have taken a picture of the stupid grin I had plastered on my face and posted that for laughs! (*smile*) It was definitely a wonderful thing to find this pretty lady.

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