For the past week a magpie has been admiring himself in the glass of our patio doors, or perhaps thinks there is a rival magpie to get rid of? Now this bird(brain) regularly comes right up to the glass and taps constantly at the glass, he will do this even when the door is open, but as soon as he realises we are near he flies off. Any idea just what this is all about? The tapping is very persistent and surprisingly loud?!!