Rufous Bettong - Apyprymnus rufescens

The Rufous Bettong is a macropod - of the same family as the kangaroo ('macro' meaning large, 'pod' meaning foot). It belongs to the subfamily called Potoroidae. A subfamily is a subclassification within a family - like the older and younger siblings teaming up to give the middle child psychological issues - that team (e.g. 'Potoroidae') within a family (e.g. Macropods) is essentially a domestic version of a 'subfamily'. Naturally there's no real patriotism without team names - so these marsupials coined something that can be chanted easily across bleachers: 'Potoroidae'. Members of Potoroidae are all between the size of a rodent and the kind of backpack a kid on a skateboard probably bought from City Beach. So, compared to a fully grown, 6-foot-tall Red Kangaroo, these are small. The Rufous Bettong is the most widespread in its habitat of all the species in the genus Potoroidae.

Studies that would raise eyebrows if they were performed on humans found that the Rufous Bettong emerges from its home fairly reliably at 40 minutes after sunset. Its nest is typically a mound of fibrous vegetation, such as reeds, long grasses, or garden-grown packets of breakfast cereals. They have a single entrance, meaning they resemble an igloo - but lighting a fire inside one is probably not the greatest idea. Same as dragging a bleeding seal inside, but that's probably less likely to be something that occurs to them.

Curiously, the population density of the Rufous Bettong can be strongly correlated with soil fertility of its habitat. Its dependence on tubers, herbs, grasses and fungi as food sources make mean these resources' prominence, or lack thereof, has a strong influence on how many bettongs can exist in an area. For this reason, in bettong habitat, it's doubly rude to bring up the whole biological clock issue with poorly fertile or unmarried soils, because the dirt gets mad and the Bettongs get depressed by their lack of compatriots.

Bonus facts about Rufous Bettongs:

Not really very rufous. Pretty small. Ostensibly lacks arms.

Has eyes. Is a ruminant (but its stomachs are in the opposite order to a cow's stomachs). Longer tail than a human. Has multiple hairs. Has less than six nostrils but more than one. It's statistically unlikely to find one that is an invertebrate.