Cities are loud, chaotic places where animals often struggle to adapt. Additionally, cities can be dirty and polluted—harming the health of animals that live there if they are not used to such conditions.
For one, cities offer a wide variety of food sources that animals can take advantage of. In the wild, animals compete with other animals for food, but in cities, there is often an abundance of food at their disposal.
Animals do a lot of incredible things every day that some may not even realize. Bats love to eat insects such as moths and mosquitoes, which might otherwise irritate us with their sheer volume of painful bites.