There were 4 babies in the nest, all 4 eggs had hatched. No sign of any egg shells, the parents carry that away immediately. Killdeer parents lead their babies away from the nest as soon as their feathers dry so the nest is empty just a couple of hours after hatching. I was incredibly lucky to see them still at the nest. I tiptoed away while the parents were still trying to drive the other people away on the other side of the road. And passed along word to the grounds crew that the nest should be empty by the next day.
Newly Hatched Baby Killdeer (Charadrius vociferous)