Wisconsin's opossums are a misplaced oddity
The opossum is a very unique animal that can occasionally be observed in both rural and urban settings. It is the only marsupial in Wisconsin.
Marsupials are animals that give birth to their young which are very small. These small, finger-sized babies will then crawl up into a pouch on their mom's underside and spend the next several months there being nursed and protected by her. Kangaroos from Australia are another example of a marsupial.