Koala
All About Marsupials
Little babies, big pouches – what sets marsupials apart from other mammals!
What Are Marsupials?
Marsupials are mammals that raise their young in a pouch. At birth, they are quite underdeveloped. Therefore, they immediately crawl from the birth canal into their mother's pouch to grow up safely and securely. Inside the pouch are the mother's nipples, where the baby suckles on milk. It takes several weeks for the babies to develop fur, open their eyes, and be able to hear. Almost 70% of the species live in Australia and New Guinea, while about 30% can be found in North and South America.
Main Characteristics of Marsupials
- There are about 320 species of marsupials in the world.
- Marsupials have a pouch where they raise their young.
- Marsupials live in America and Australia.
- Marsupials include koalas and kangaroos, as well as opossums, mouse opossums, wombats, Tasmanian devils, numbats, gliders, quolls and thylacines.
- Marsupials are herbivores, omnivores or carnivores.
- The largest marsupial is the red kangaroo, which can reach a body length of up to 5.9 feet (180 cm) and weigh as much as 198 pounds (90 kg).
- The smallest marsupial is the long-tailed planigale, measuring only 2-3 inches (5-7 cm) in length and weighing between 0.1-0.2 ounces (3-7 grams).
- The smallest mammal baby in the world is the honey possum. It weighs 0.0001 ounces (5 mg) at birth.
- Among all mammals, the Virginia Opossum has the shortest gestation period, lasting only 12-13 days.
Marsupial Family Tree
Top 3 Features of Marsupials
1. The Pouch
The pouch is a type of skin sac located on the mother's belly. It protects the newborns from cold and rain. In kangaroos and wallabies, it opens upwards, while in wombats, it opens downwards. This is related to their way of life. The wombat digs burrows and spends a lot of time underground. If its pouch opened upwards, dirt and soil would get inside.
2. A Very Short Gestation Period...
The North American opossum has the shortest gestation period of all mammals. After mating, it only takes 12-13 days for its babies to be born. Even rodents like hamsters, mice, and rats have a longer gestation period. The longest gestation period among marsupials belongs to the tree kangaroo: it lasts 44-45 days.
3. ... But a Long Time in the Pouch
For most marsupial species, the time spent in the pouch is significantly longer than the gestation period. Depending on the species, the babies remain in the pouch for 2-10 months until they are big and strong enough to leave it permanently.
