We've had a lot of goldfinches in the back garden lately, using the birdbath and eating seed from the feeders. Today while I was mowing the lawn one of them flew into the window. It lay stunned in the grass for a long time. I went inside and got my camera and took several photos of it. It flew away after a little while. Later I got a few photos of a goldfinch in the tree.....I doubt it was the same one.