Don't count your eggs before they hatch?

It's chickens I know, or chicks. But we'll just deal with eggs now.

OK, we have 13 bluebirds fledged. And there are new eggs in three nests. One has three, the other two have four. None of these are near where we have wren activity.

Well, we are going to count anyway. If all the eggs are successful, we will get a total of 24 bluebirds, which is then normal for these boxes for a year.