Mud swallows, or American Cliff Swallows, build conical mud nests and lay 3-6 eggs per nest. In nature, they build their nests on cliffs, preferably beneath overhangs. However, man-made structures are now the location of choice (bridges, patio overhangs, tall buildings), as long as there is mud close by. Our balcony overhang, and proximity to the Jordan River and a canal that runs through the property, make us the prime location for these visitors. We can see why, because they have the best view in the valley.
As of 6/12, nest construction progress has doubled from the posting of the news story.