2030 hrs
Ivy was on Egg and Eggette but was very twitchy.  As soon as Princess appeared, off he went.  Now Princess is sitting on the box edge looking around, I think watching him.  Given the speed with which he left the box, methinks he may be shortening the lifespan of a fellow bird ...
2034 hrs 
Princess is in the box and has shuggled the eggs under her, I suspect for the night.  They are spending lots of time away from the eggs, so incubation definitely hasn't begun, but they are keeping the eggs a wee bit warm.  Not surprising I guess considering we are still about colder than normal for this time of the year.