Violet-green Swallows begin building

Thanks to my remote cam (which I have mounted outside near the nestbox) and the other camera inside the box, I can now observe a little more of the behavior of this pair of Violet-green Swallows. I didn't see the feather or the piece of vegetation inside today, but tonight when I downloaded the photos taken outside I discovered that the female had begun the nest-building process. Now I can worry a little less that they will decide to move across the street to my neighbor's birdhouse.