Hornet or cicada killer?

Not quite white stripes but not yellow either. More like cream or ivory. Definitely not a great image but literally was the only one that captured some detail. Obviously the 1.7x TC slows down the AF a lot and is part of the reason why I've been having trouble with focusing when coupled to my 300mm f/4 PF.
There was a swarm of these flying around. Unfortunately none of them would settle down. No sooner would I achieve focus when they'd suddenly dart away really fast. I even upped my shutter to 1/4000" but still couldn't capture any in reasonable focus. Had to do some post processing sharpening with this as it was.
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