We've been having a very cold and snowy Winter (and it's not just humans who are feeling it) and a month or so ago I went to put food in the bird feeder and found a dead (frozen) sparrow at the bottom of the feeder it's head sticking out through the wire. I cut the wire (only one on the bottom and one on the side) and took the sparrow out. What I forgot was to patch up the small hole/space it made. Well today I looked out the window and realized why I should have patched it up!