What would be a good symbol to represent Scout from To Kill a Mockingbird?

This is purely a subjective, opinion question, but if you want to continue Harper Lee's bird motif, you should choose a bird to symbolize Scout--one which encompasses the narrator's boldness, protective nature, and inquisitve spirit.  Personally, I think that the blue jay would work well for Scout, but whatever you choose, try to ensure that you avoid Scout's last name since Lee has already chosen that for symbolic purposes.