One of the most common, if not the most common, birds around here is the American robin (Turdus migratorius). The shell fragments of their bright blue eggs are frequently seen under the trees in the spring and summer.
I saw these 2 robin eggs a week ago along a path near my house. They were about 2 meters apart when I first found them, but they were probably from the same nest. Although both had been punctured, the chicks were still inside.
According to the information provided by the Cornell Lab of Ornithology (link above), on average, 40% of robin nests successfully produce young and only 25% of the fledged young survive to November. None from the nest we had above our mailbox last year survived to fledging.