Hi, I have a nest box with a camera, so I'm able to watch the coming and going of the Great tit nesting in the box. She's laid 9 eggs. but she doesn't have a partner. She's been incubating the eggs for around 12 days now, but she leaves the nest quite regularly I expect to feed, normally she gone for only a few minutes, but occasionally it is longer than 30 minutes, in the first few days she left the nest for 3 hours because scaffolding was being taken next door. So I'm concerned firstly the eggs will probably not hatch because she leaves them for to long, (I have read they can be left for 30mins) and secondly if they hatch what are the chances she could rear the chicks on her own.