Comings and goings

Lockdown day 50

We have a nesting box in the garden, home to a pair of Great Tits and their family .
The young have hatched and  we can hear them chirruping away. The parents are backwards and forwards all day long bringing food  and clearing out the nest. It must be exhausting.
The main photo shows one of the adults clearing away what we assume is a faecal sac, to keep the nest clean and tidy. 
The first extra shows the bird going in to the nest , I liked the symmetry, and the last one is the adult in flight. Even at 1/2500 of a second it's difficult to get it in focus and the wings are still a blur.