The eggs have to be turned to ensure uniform warmth and development. Our bird continues to import nest material, straw, hair, feathers, and soft stuff. She enters the box at speed, then flies up and down to the camera a half-dozen times, before relinquishing her hold on the contents of her beak. 7th May 2001. Eggs are being laid in box 2.
Today there are four.
A beautiful sunny spring day. The microphone in box 1 developed a fault so, while the bird was foraging, the box was demounted and the microphone fixed. The following pictures were taken of the nine eggs. A close-up of the nine eggs We can see here that the markings on the eggs in box 1 are more vivid than the markings on the eggs in box 2. The textbooks tell us that this is possibly because the bird in box 1 is younger than the bird in box 2.