blackbird and blue-tit

This morning while I inspected the bird house, looking if someone is at home,
I suddenly saw a blue-tit flying out of the hole of the birdhouse.!
surprise!

and........... the blackbird was at home, sitting on the nest...
probably has an egg...
in the process of having more.

so the next couple of weeks the blue-tit and the blackbird share appartments!
a real birdflat!