Bird enters box.
This is Box2. For the last two years Box2 has been empty. Let's hope this year will be different.
Has the normal look-around.
Is this bird moving out of the way to let his partner in?
Yes! In comes the female.
They are both in the box for the shortest of times ...
... before the male departs ....
... leaving the feamle by herself in the nest box.
She didn't stay long. A few seconds later, she too was on her way.