DH found these nestled in our now dry winter pond as he mowed the other day. In fact, he discovered them after he’d gone over them with the mower, luckily doing them no harm. These are future progeny of kildeer, which are not particular about nesting locations nor staying with the eggs. (A neighbor found kildeer eggs in their gravel driveway.)
The eggs are very small; the keys are for comparison. We’ve heard kildeers around but seen more of other birds than we have any relatives of these eggs. The eggs should hatch in 22 to 28 days.