Our bird feeder is a great success this year. It’s attracting incredible numbers of goldfinches and redpolls, veritable swarms of them. It gets so crowded that when, all of a sudden, they decide to take flight, there isn’t enough room for all of them and some crash into our kitchen windows. It feels awful to think of their little bodies hitting the glass, but they don’t hit it with much speed and so they all seem to survive it without too much harm. I haven’t even seen any fall on the ground. But they leave blotches of feathers on the window.