Yellow-jackets are social insects that mark threats with a scent-marker.
The marker is a smoke flare for other yellow-jackets to home in on and sting the snot out of.
Same orchard as last time.
Same row, same grapevine. Other leg, down by the ankle where my leg entered my shoe.
The upside is that it was the front of my leg so I could identify the culprit.
Tomorrow morning, shortly after sunrise, I intend to be sitting in a lawn chair some 40 feet west of the scene of the crime. I will be looking for where the yellow-jackets are coming out of the ground.
If my legendary good luck holds, it will be where it is grassy and easy to approach.
If it is beneath the grapevines, then additional planning will be required.