Near our place in Delaware is a small town called MILTON. Its the Home of Dogfish Head Beers (Beers with the ABV of 19%) . In Milton center is a large lake that formes the headwaters of the Broadkill where Milton's sailing ship building industry began back in the 1700's. Today its been high dammed and is just a large lake for boating and fishing. It has a large native population of canada geese who stay the year round.
Every 5 years or so, because the geese **** up the lake and cause major algae blooms, the town "fathers" used to shoot and /or poison the geese. They get maybe 90% of the population which leaves maybe 15 who dont get whacked. They stopped poisonong them and make a yearly hunt (in the town lake) where the geese are cooked and bbcued (post mortem) .
I can understand the way that nature can overstay and overpopulate itself when left undisturbed or un hunted. Since it was a suburban area lake and hunting "safety Zones" were about 150 yards but there were lakefront houses all along the lakeshore, hunting rules needed changing. Changing often ment that, once in awhile, someones kitchen windows (Why do people have their kitchen windows overlooking lakes and other waterfeatures?), would get blasted out by number 6 iron shot. But, it happens rather infrequently so that, henever a window shot dos occure, it gets written up on the front page of the Cape Gazette, or the Delaware STate News.
Now they have a whitetail deer problem where ticks and skeeters have spread CWD (cervid wasting disease) to the resident deer. Its now been found out that animals with CWD CAN transmit a form of brain infection to humans. Its sorta like the CJD we used to get from "MAd Cows"
We live in a very sick environment that, will require evolution to step in and sort it out with the deer or we humans become immune to the diseases (or both)