DAY 5 Busy and Exhausting day for the builders

DAY 5 Busy and productive day for the couple. They started before 7am and stopped not long after noon.There was a little rest time in the box late morning, that's in another clip.
Some very interesting and lengthy material being used for building. I've extracted most of the clips (and sped it up) where the Sparrows bring nesting material to the box. Some visits had nothing and I think there was an intruder Sparrow occasionally checking it out but not going into the box,