A Ring-billed Gull was stationed at the end of our dock for several weeks. It often left scat and various signs of feeding. On occasion I would find parts of pellets. Finally, I found an intact pellet and photographed it. The final photos show the pellet after dissection: fish bones and scales are evident in the pellet.
(Photographed September 10, 2016 along Chemong Lake, Emily Township, City of Kawartha Lakes, Ontario, Canada)