Most birds' reproductive organs are shriveled until Springtime, when they swell. At a successful CK, an ovum is sucked into the beginning of the oviduct where it is fertilized. Then it's squeezed into an area called the magnum, where the eggwhite (albumin) is added. This takes several hours. then it moves on to the shell-membrane stage (about an hour) and on to the uterus, where it gets its shell and coloring (about 20 hours).
Laying the egg takes only a few minutes, as can be seen in the video. The female is "pregnant" for about 24 hours. During this time, the female carries extra weight and is vulnerable, so she sticks close to the nest.
She may carry only one egg at a time, so a new CK is needed for the next egg. Keep watching!
Watch for a third egg in a few days, perhaps Sunday.
And having served its purpose, whatever that was, the carcass has now been dumped overboard.
Incubating is a quiet peaceful time. Rosie sits on the eggs and contemplates the world. Richie goes out fishing and when Rosie sees he has a fish, she calls for it, sometimes quite insistently. Just as insistent, when Richie delivers the fish, he demands his time on the eggs. Richie loves to incubate. Is this true of all male osprey?
Rosie takes this time to eat her fish and take a poop. She and Richie both step carefully around the eggs, curling their talons. They check the eggs at shift change. They also turn the eggs periodically and fluff up the nest bowl material.
This year, the quiet has been punctured by more guard calls, as other ospreys fly by the nest. At first, there were ospreys trying to land on the nest; now they seem to just fly by. The area has become more crowded and there is now a nest on nearby Marker 16 with an osprey pair (now apparently abandoned).
Richie wanted to try for a fourth egg, but Rosie let him know that she was done with CK's for the year.