You need to show him you are the " Top Bird", don't ever run away from him because that tells him you are scared and he will chase you.
What you need to do is, every time you go near him stomp your feet and show him your the boss, even if it means chasing him ( if he attacks you again ) with a stick, even until he's too tired to run, my friend suggested this and it has really worked for me, hope this helps.
What you need to do is, every time you go near him stomp your feet and show him your the boss, even if it means chasing him ( if he attacks you again ) with a stick, even until he's too tired to run, my friend suggested this and it has really worked for me, hope this helps.