A pellet of fish tiny fish bones. (1924 silver dollar is 1.5″ in diameter.)
There were a few on this bench, the same location I found some a few years ago.
Not much mystery here: a male Belted Kingfisher has been snapping up tiny fish here, off and on, for weeks.
Check out also the white wash on the branches beneath him. A busy, energetic, noisy specimen.
With one of the wee wigglers in his bill.
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This work by Matthew Wills is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License.
Backyard and Beyond 
Lovely photos of one of my favorite birds, the Kingfisher. You’ve caught their markings beautifully.📸