A Collared Dove flew into the holly tree today. I had hoped it would take over the ready-made nest but it didn't remain long. I decided to investigate and discovered the reason for both that and Mr/s C-D sitting ever higher. The eggs had hatched and s/he had been sitting over two squabs. The nestlings are covered in fine yellow down and simply look as though they're sleeping – and I suppose they are, really – forever.