The
male, which is inside this box at this moment, spends much of his time
trying to tempt the female inside. He is usually unsuccessful - she
goes inside only once or twice a day.
The female comes to the nest box hole, blocking the exit, but normally just sits there refusing to enter.
This
time the male has had enough. He starts to force his way past the
female.
She
appears to not want to give way, but he insists and leaves the nest box.
It
looks here as if she was knocked off her perch as he escaped - or was it
just a particularly ungraceful departure?