Nora, that's a great pic of the 4 eggs with Newman and Savanna.
On rewind about 7:00 this morning, Savanna arrived, Newman left and returned to attempt a copulation, then she took over egg duty. Do peregrines lay 5 eggs sometimes?? It's difficult for this nest box to produce many successful fledges because of its location, accessibility to predators, black fly infestations, and on and on. So they have their work cut out for them with 4 potential hatches in a few weeks.