This was taken a few years ago. Called nearby university entomology dept. - they were not interested. Said was common near bodied of water.
We have a small pond that is about 1000 feet away.
If we tapped on the window these hornets would come out "fighting mad" start hitting the window panes, sounded like hail on the roof.
(I don't think any of those in the pictures were smiling for the camera)
Did some video and had several that brought friends to come upstairs and watch the activity.
After a while we were afraid visitors to front door might get stung, SO out came the night time spray and after two sessions we scraped the nest off the window.