American Oystercatchers make “divot” nests, basically a depression in the ground which in this case was a mound of shells.
While one adult sat on the nest the other paced around…
…what else is there to do until the young hatch?
I didn’t get a very good picture of the overall scene, but this gives you an idea of how vulnerable these birds are.
Marsh edge of Kiawah River, SC
June 1, 2022