Tarantula Hawk
Genus Pepsis

This wasp holds the record for the largest wasp I've ever seen - even larger than the Cicada Killer. When I first spotted
it, I thought it was a hummingbird because of the size and because it was
humming (it reminded me of when we used
to clip playing cards to the spokes of our bicycles when we were kids to make our bikes sound
loud and, of course, cool).  
I would guess it was 5 plus centimeters in length. The photo below is of another one (also female) but this one was about
 a centimeter smaller and did not hum (from the wingbeats, I assume). Carol Davis 9-3-2013

tarantula hawk in utah
Both wasps were blue-black with orange wings and looked like they had been splattered with with messy paint
Even their eyes were covered in pollen from the Rocky Mountain Bee Plants.  In my experience, Tarantula
Hawks are hard to approach because they keep
making false charges (and scaring the crap out of me).  I have no
 doubt either one of these wasps could carry off a tarantula or even my old VW Beetle. In addition, t
heir stings list high
on the Schmidt Pain Index as reported by Shelley Batts on Science Blogs. 
Carol Davis 9-3-2013, Antelope Island.

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