But after about six weeks, when the young are able to leave the nest, the entire family will move to a summer nest in the trees. This is the time to repair attic openings to prevent a recurrence, since squirrels usually have two litters a year. Bloodmeal fertilizer mixed with topsoil should put an end to garden excavations, and baffles added to your birdfeeder will prevent pilfering. Opossums are the least troublesome mammals, but should they decide to den under a porch, they may make nocturnal raids on the compost heap or your domestic pet dishes. They are, however, very wary and can be scared off quite easily by opening the nearest door.
Opossums are marsupials.
They carry their young in a pouch until they are old enough to cling to their mothers back as she forages for food.