I grew tomatoes yearly when I was young. I would always have to battle the green horn worms. They got to be real big and could strip kill a good healthy plant quickly. The birds were my natural ally. I recall seeing a Cardinal doing battle with one. The plant shook like it was in an earthquake until the bird, with the worm draped out of both sides of its beek, staggered into the air with dinner for the next week. Are they still a problem like they were fifty years ago?