While most are relatively docile, opossums can be fiercely defensive if provoked. They are incontinent, which means they can destroy a crawlspace or attic in a short period of time. They are omnivores, which makes them highly adaptive to urban environments. They will give birth to up to 20 babies called Joeys, who will crawl from the pouch to the mother's back and often stay with her for up to a year. Exclusion methods for opossums can vary and, unfortunately, can be difficult to physically extract because they tend to stay very quiet, making them hard to find. Identifying the entry point and installing an exclusion door is typically the best option.