And then there were 3!
So far everything is progressing normally for this year's nest. Scout laid a 3rd egg today, 3/24/09, about 5:47 p.m. The usual clutch for peregrines is 4 eggs. If there is to be another egg we can expect it Thursday or Friday. But with the clutch having most of the eggs in it at this point, Scout and Orville will likely begin incubation. With an adult keeping the eggs warm it will be harder to detect just when that egg is laid. We'll have to try and catch a glimpse when the birds trade off incubation duty.
Details on incubation: usually, the female does most of the incubation duty and the male's primary job is to provide food and take her place while she eats and/or otherwise takes a break. But, if I remember correctly from last year, Orville was on the eggs quite a bit. We'll see how things work out this time!