You read the title. I want them gone.
Strain of avian bird flu jumps species to humans. Seagulls are carriers only, but it is lethal to us. It spreads rapidly through the seagull populations of the coasts. Only thing to do is what we do with any bird population that exposes us to that virus: we kill it with a vengeance. Several million ducks/poultry killed in China during the last outbreak. Once the call goes out to "take 'em out!", it won't take long to go extinct. The passenger pigeon vanished in just a 19 years (hunted for fashionable feathers), from billions of birds (literally) to none. Our species is much more efficient these days with hunting. Just license permits and I bet every seagull in existence could be purged in a couple years.