Here's some tips about seagulls:
1. Usually seagulls are more aggressive in the springtime when eggs are laid or their young hatch. They get very protective. Try to avoid that season.
2. If you encounter aggressive seagulls, ascend 100' with full power, then leave the area fast. Seagull cannot climb as fast like you can.
3. When you encounter seagulls and you leave the area, don't go back to that general area that day because they'll be looking for you.
4. Generally momma seagulls stay close to their nests, within half mile.
5. Don't assume all seagulls are aggressive, I've flown behind many seagulls and they seem oblivious to me, even though I know they can hear me. With P4, I will occasionally chase them with 2X zoom enabled to stay away a greater distance. They tend to not be concerned when I do that.
6. Seagulls cannot see the props spinning, they can ram your craft, thinking no harm will come to them and potentially bring you and the seagull down.
We need a loud speaker on the drone to play some bald eagle squawks.
Maybe a drone wrap that looks like a bald eagle would help.