If you want to know who is who ... look at size. When the birds are on the eggs, you can see more space between Ivy's back and the top edge of the box. When Princess is on the eggs, she takes up more space top-to-bottom.
Am trying to figure out a way to get more light to the covered part of the box but have to figure out a way so shadows or whatever from above don't make the birds more twitchy. Have an idea but not the details yet. Soon I hope though.
