If you look very closely at the pupil of the bird's eye here you can get some indication of how dull it is by the nest. If it were bright of course, the pupil would be very small. I took very accurate timings of the time between visits with new nest material. On one occasion it was just 10 minutes between visits but usually more like 20. Each time the returned today it was the female who was carrying nest material. As I didn't discover the nest until just four days ago, I can not say whether the male has taken part in any of the nest building but I can confirm that in the four days that I have been observing, I have only seen the female doing any of the building.