If you ever visit a landfill or a dump, chances are the skyline will be crowded with circling, shrieking gulls that descend on the heaps of garbage like it’s a lovingly prepared feast just for them. Blanketing the area with their excrement, they carry the bacteria-rich trash and dump it on nearby communities, polluting water sources and leaving health hazards to rot in the open. Sometimes they even get aggressive, dive-bombing people who come to…