Our beloved Alexandrine parrot (Tiko) who accidently flew away two years ago at the age of 7 was finally found 16 months later at a home 5 miles away after lots of advertising. Since her return, she has become more loving, does similar things she used to do and looks the same with the red marking on her wings exactly the same. However, her flock call has completely changed. Sometimes I wonder if we got the same parrot back. Does any one know if Alexandrine parrots change their flock calls completely during their lifetime. Many thanks