Blue tits

  1. I've recently moved into a new flat and I noticed I had a pair of blue tits nesting in the wall cavity underneath my kitchen window and after a little bit of research I understand they will feed the young for around 3 weeks that time has roughly passed so I've been patiently waiting to hopefully catch a glimpse of the young when they leave. The parents was still feeding yesterday morning before I went out I didn't see them in the evening and there not around this morning could i have missed it? Do they leave straight away, and do they leave the area straight away any help would be greatly appreciated thanks 
  2. I've really enjoyed watching them come and go frantically they work so hard for such little guys