Seeing Through Glass

I recently took these photos of a Goldfinch from about 2 metres away.  How, you ask, did I get so close.  Well I didn't get close to it, it got close to me.  I was working in the kitchen area when it came down onto the bank outside the window.  I moved away to get my camera and moved back and took the photos.  It seemed completely unaware of my existence.  The double-glazed windows are clean enough to take a photo through and there was no sun.  As it appeared to be looking straight at me I wonder if it just couldn't see through the glass.  Odd.

Goldfinch

There are a lot of Goldfinches in the area round The Cottage and flocks of them flit hither and thither - usually staying some distance away from human presence. However this lone one decided to sit outside the door and enjoy his meal and ignore me.