Baby opossums are born as embryos, barely larger than a bee, and spend about two months nursing in their mother’s pouch. When they get to be about 3-4 inches long and start riding around on the mother’s back, they may fall off without the mother noticing. As a general rule, if an opossum is over 7 inches long (not including the tail), he’s old enough to be on their own; if he’s less than 7 inches long (not including the tail), they are an orphan and appear to be healthy, you should contact a licensed wildlife rehabilitator.
If you know the parents are dead, contact a licensed wildlife rehabilitator to take the orphans.
Note! If the baby opossum are injured, follow these instructions.