Red kangaroo unusual ability to delay birth of their baby until their previous Joey has left the pouch. This is called embryonic diapause. Copulation may last 25 minutes. The red kangaroo has the typical reproductive system of a kangaroo. The neonate emerges after only 33 days. Usually only one young is born at a time. It is blind, hairless, and only a few centimetres long. Its hind legs are mere stumps; it instead uses its more developed forelegs to climb its way through the thick fur on its mother's abdomen into the pouch, which takes about three to five minutes. Once in
Doria's tree-kangaroo it a bear-like appearance. It is mostly solitary and nocturnal. Its diet consists of various leaves, buds, flowers and fruits. The gestation period is about 30 days, after which, the single young remains in the mother's pouch for up to 10 months. Doria's tree-kangaro is an IUCN Red List Vulnerable species. Its forest habitat is threatened by logging and forest clearance. Being large sized, it's also hunted for its meat. Doria's tree-kangaroo Doria's tree-kangaroo ("Dendrolagus dorianus") is a tree-kangaroo endemic to Papua New Guinea. This marsupial is found in montane forests of southeastern New Guinea island, at elevations between 600–3650m.