Is it normal for a seagull to follow you 100 miles away after you have been feeding him?

Are you really sure it's the same one? They do kinda look alike. :)

I'm sure it's not normal, but not impossible. They are smart birds and food can be hard to come by. With the right winds a 100 mile journey is not necessarily a huge effort for them, so the trade off between the trip and what it might get out of it (more food from you) could be worth it.

I've actually had one follow me the best part of 150 miles... but it was across the English channel. I was on a small boat so the gull could easily keep up and not lose sight of us. Not sure why it followed us as we didn't even feed it till half way across.

If you drove 100 miles I'd be very surprised if it was the same bird!