Opossums, the only marsupials native to North America, have a unique life cycle, with early development in their mother’s pouch. Understanding a 4-month-old opossum offers insight into their rapid growth and transition towards independence. This article details their physical attributes, developmental progress, and guidance for encountering young individuals in the wild.
Physical Characteristics at Four Months
A 4-month-old opossum typically weighs between 300 to 700 grams. Their body length, from nose to the base of the tail, generally ranges from 6 to 9 inches. These measurements indicate a sub-adult stage, as they have not yet reached their full adult size, which can be comparable to a domestic cat.
The opossum’s fur is fully developed, appearing long, puffy, and often grey. Their eyes are fully functional and open. The ears are well-formed, though they remain hairless. Permanent teeth begin to emerge around 4 to 5 months, transitioning from their initial milk teeth.
Developmental Milestones at Four Months
At four months, opossums are entering a phase of independence. While they may still occasionally nurse, they are increasingly capable of finding their own food and water sources. This marks a period when they begin to separate from their mother, venturing out alone.
Their diet shifts from milk to a varied omnivorous intake, mirroring what they would forage in their natural habitat. This includes insects, various fruits, vegetables, and small amounts of meat. Mobility and coordination are well-developed, allowing them to climb, walk, and explore their surroundings effectively. Their prehensile tail is fully formed and aids in their agility. These abilities help them learn survival skills, such as locating food and avoiding predators.
What to Do If You Encounter a Young Opossum
If you find a young opossum, assess its condition carefully before intervening. An opossum less than 7 inches long (excluding its tail) or weighing under 200 grams likely requires assistance, as they are still dependent, orphaned, or injured.
Observe the animal from a distance initially. If intervention is necessary, do not handle the opossum with bare hands; wear gloves for safety. Avoid offering food or water, as inappropriate feeding can cause harm or be fatal. Contact a local licensed wildlife rehabilitator, who has the expertise and legal authorization to care for wild animals.