Wonderful image indeed.

https://www.onthewingphotography.com/wings/gray-partridge-images/
"Jugging" - The roosting of a covey of partridges (family Phasianidae), the group in the roost being called a 'jug'.

Possibly from the Scots 'jougs' - a round iron collar

https://www.linkedin.com/pulse/ecology-grey-partridge-perdix-mervyn-p-walsh
In fine weather, the night is spent in a tight group in open areas preferably 25-80m from the nearest tree; a behaviour known as ‘jugging’.


I was hunting in NE KS in the above 0 teens in 10" of snow. My setter went on point, pointing at snow and no cover. I foolishly didn't trust the dog, but kicked around and out popped 6 quail that were in a snow-covered hole. Felt bad about disturbing them.

https://sites.google.com/a/damascusknowledge.com/www/home