The wrens have been very active on the nest in birdhouse #1 this morning. I took a look at the interior of #2 and saw a few twigs that weren't there yesterday. So we'll have to pay close attention to that too.
This mornings activity has made up for yesterday. It has been almost nonstop all morning. The amount of material brought in probably doubled what was already there. At this point you can see that it almost reaches the knot hole on the side wall.