Kamikaze Chaffinch

Over the past few day, we have been disturbed by knocking at one of our windows.  Our investigations revealed that it was a chaffinch which seemed to be trying to fly into the house.  There are some indoor plants around so perhaps it has seen a possible nesting site.  It doesn't perform to camera and hid behind a small branch when I tried to take a blip.  the hiding wasn't all that successful.