They Changed Their Mind

I had posted earlier that the pair of Bluebirds had decided to set up housing in the Bluebird house on the west fence.  Well, today a pair of wrens decided that they wanted that as their home.  Wrens might be songbirds, but they are definitely at the bottom of my list..  In past years they have destroyed many Bluebird nests..
Anyway, I went out to check the house on the west fence, and yes the wrens had started build a nest of "sticks" over the neatly made Bluebird nest below.  I removed all the sticks so the Bluebird nest was open again.  I decided to check the two other houses also, because Wrens could easily decide to fill all three of the houses with sticks.  I checked the second next and there was a partial Bluebird nest, but no sticks.  I thought maybe the Bluebirds had changed their minds and abandoned that nest.  I'll have to watch and see if there is any activity there as time goes on.  
So I went to the third house and to my surprise there was a fully made nest and four eggs in it.  Three of the eggs were a light blue and one egg is light blue with speckles.  Fortunately, this house is located so it easy for me to keep a watch on it.  I'll keep you posted.