Yeah one of my best ideas in a long time...
As you may well know, sometimes seagulls form these large colonies with dozens of nests in a small area.
And if you make the mistake of going into that area, especially in a time when they are incubating their eggs, you've made a big mistake!
So basically I'm suggesting to add a new dungeon, seagull dungon.
It would only spawn on ocean beaches, and only during spring (as this is the season when they lay their eggs etc.)
In the dungeon, there would be seagulls as enemies, and in each room there would be nest(s). You would kill the seagulls and then raid the nests.
As a loot you would find eggs and feathers which would act as food/curios. Also, possibly some seagull poop which could be used for increasing crop qualities, kind of like the crop circles do.
And now the most important part: a new wound called "Bombarded", which you could get when the seagulls decide to "bombard" you. Could be related to the dungeon or just being around normal seagulls. Not sure. But it must be added, along with some nice illustration. Could give some cha minus or such, would be mostly for flavor.