In one of Austria's largest public outdoor swimming pools with access to a branch of the Danube (capacity 30,000 visitors) a group of Canada geese have settled down (which is not without conflicts). Ironically, the name of the lido is "Gaensehaeufel" which means a hoard of geese and a small pile ...
In the same area, one pair of beavers felled 40 trees within one year.
A Viennese school often has to cancel Physical Education because of about 40 wild hamsters living on their sports field and making so many holes that there's acute danger for the kids of wrenching their ankles.
We have hundreds of foxes, kestrels, badgers, bats in hospitals or office towers, boars and wild sows, ring-necked parakeets from Africa, Chinese mandarin ducks and many more within city borders.
According to experts, cities are very attractive for wild animals, because there's plenty of food. Additionally, the design of the parks is more and more near-natural with lots of hiding places and scrubs.
The fellow in the picture above doesn't live in Vienna, but in my home-village. He seems to like the vicinity of houses as he's sitting about 1 metre from my backdoor.