Calaby's pademelon (Thylogale calabyi), also known as the alpine wallaby, is a species of marsupial in the family Macropodidae.

[2] Pademelons share many similarities in body structure to other marsupials through their pouch to care for their young and tail used for jumping.

Calaby’s Pademelon prefers to forage in dense forested overgrowth and feeds on native leaves and grasses.

The reserve is an acronym named after three major rivers that run through it, the Yopno, Uruwa, and Som of the Huon Peninsula and works to conserve Calaby’s Pademelon.

During the day, they rest in shallow depressions that are constructed nests lined with dead vegetation, shell fragments, feathers, and small pebbles.

The gestation period for the female is 30 days while the ‘joey’ stays in the pouch for sixth and a half months after birth.

These people started hunting the marsupials for meat and fur trade and frequently burned habitat vegetation.

Aside from being killed for their meat and soft fur, their numbers have been reduced by the introduction of predators such as feral cats, dogs, and foxes.

Human activities that have impacted the pademelon populations include roadkill, loss of natural habitats from clearing for management, agricultural purposes, and urban development.

Climate change and severe weather is altering and shifting habitat range leaving pademelons exposed in grasslands as forests are reduced.

Mostly males are shot since they are bigger and an easier target thus impacting population dynamics in gender balance and genetic diversity.

Calaby’s Pademelon is currently only found in two locations in Papua New Guinea which are suspected to be the two remaining subpopulations of relicts of what was once a more widely distributed species.

The reserve is an acronym named after three major rivers that run through it, the Yopno, Uruwa, and Som of the Huon Peninsula.

The establishment of parks and nature reserves plays an important role in conservation efforts for these endangered species.

Although pademelons are widespread and common in coastal eastern Australia, Tasmania, and surrounding islands, they have been largely neglected in population genetic studies.

Research is also being conducted to understand individualistic responses to historic climate change in order to adequately conserve genetic diversity and the evolutionary potential of species.