It is possible to enter an unrealistic combination of characteristics that does not match any bird or produces the wrong or unexpected bird. If this happens, carefully re-evaluate your input. Use the History Button feature to select a point at which you may re-answer questions. You may simply have entered a wrong choice.
Remember, if uncertain as you are questioned, you have the option of responding Unknown to most questions. This is better than giving the wrong answer. If many unknowns are given though, be prepared for being offered more than one possibility for consideration.