Over the last couple weeks I've enjoyed watching Eastern Bluebirds take up residence in one of my nest boxes. Once committed, they work frantically entering and exiting the nest, carrying bits and pieces of grass and pine straw to it. This particular nest box is attached to my grape vine trellis located in the back yard.
In this photo the female (the one hanging on the front of the house) is carrying some nesting material in her beak and is about to pack it in the nest box. The female bluebird does about 95% of the nest building. The male will occasionally bring nesting material to the nest in the beginning but it doesn't last long. I've also noticed that whatever little contribution he does make tends to be redone by the female (sound familiar?).
This particular nest is getting close to completion. Hopefully there will be eggs in a few days!