This is the father or mother of a family that is lodging lately in our house... They are a family of "meesjes" and they made their nest in a tiny hole above my study. The hole is originally used for ventilation for the double wall that surrounds the house.
We know there are little ones inside, because papa en mama bring food often, and little noises come out of the corner. Also, we found a little dead bird once, who seems to have fallen from the nest. :(
Here: standing for the photo and flying out of home.