Canada geese. It's not just a problem of too many geese, but a problem of geese in the wrong locations—on golf courses, business parks, in public parks, and on school sports fields.
Each adult goose produces 1 to 1 1/2 pounds of droppings per day. These droppings aren't just something we don't like to step in. Quantities of goose droppings are detrimental to the grass itself, and any bodies of water they are washed into, causing algi bloom.
Canada geese habituate to chemicals, pyrotechnics, fences, noise makers, plastic swans and streamers—and no longer deter so easily. Chemicals can be toxic to the environment or nontarget species and some are not biodegradable. and most need frequent re-aplications.
While grazing, an adult goose can destroy as much as five square feet of grass each day.
Most control methods for Canada geese are economically prohibitive to landowners, businesses, and homeowner associations, or are aesthetically unappealing. They also tend to just be temporary, since the geese soon habituate to them, and will no longer leave.