Blue grosbeaks build some interesting nests. They are always looking for the newest in building materials. Some industrious bird incorporated an entire plastic bag into this nest. Can you imagine what that must have looked like? Here's this pretty, deep blue bird flying down the road dragging a grocery bag in its beak. And then the actual weaving of the plastic into the nest. Wish I could have seen it.
I got a little curious about what might be in an abandoned nest this time of year. I grabbed a rake and pulled the limb down to eye-level. Seems that the water oak is using the nest to store acorns and some caterpillar used it as a restroom back in the fall. In case you missed my post on caterpillar frass(buried somewhere in my archives), then let me help you out. The brown thing that looks sort of like some sort of decorative bead is the frass.