An opossum is the only mammal with a pouch to carry its young (marsupial) that lives in North America. They originated in the southern states and hitchhiked their way North on trains and boats. They reside under houses, sheds, decks, etc. where they can keep warm through the cold winter months.
At Niagara Wildlife Control we use live traps to humanely trap and relocate opossum and their young. Repairs on the property are then completed to deter future housing of nuisance animals.