Diseased Bird: male house finch with tumor

House finch with tumor on its forehead, just above the beak. has been at the feeders since Feederwatch started. Was flying and eating pretty good, although last week he seemed to have difficulties flying. Have not seen him this week. It was bitterly cold for Albuquerque last week, and he may not have made it. THere was one other male house finch with a tumor on its head, he was not doing well when I first saw him in late November and I have not seen him since. I did not get a picture of this second bird.