THE ANIMAL FILES

Common ringtail possum

Pseudocheirus peregrinus

A gripping tail and a second pass through the digestive system.

Common ringtail possums climb with prehensile tails and eat leaves, flowers and fruit. They reingest soft caecotropes to obtain more nutrition from plant food, and share branch-built nests or use tree hollows.[1]

Follow the evidence ↓
Common ringtail possum
Image: Andrew Mercer (www.baldwhiteguy.co.nz) · Commons · CC BY-SA 4.0
Tail
Long and prehensile, often with a pale tip[1]
Plant food
Leaves, flowers and fruit[1]
Shelters
Dreys and tree hollows[1]

The tail participates in climbing

A long prehensile tail, often with a conspicuous white tip, is part of the animal’s climbing equipment. The hind feet have joined digits associated with climbing, and the molars have pointed cusps.[1]

Leaves require more than a quick chew

The molars cut leaves into smaller pieces, and fine particles can remain in the caecum for further processing. Soft caecotropes are later reingested, allowing another passage through the digestive system. This is distinct from the hard droppings produced during feeding, which are not treated in the same way.[1]

A nest can be a shared centre

Common ringtail possums use communal nests called dreys as well as tree hollows. A family group can maintain several nests within its area. Shelter is therefore not only a place where an isolated individual sleeps; it also links adults and dependent young, including youngsters that no longer ride on the mother.[1]

A COMMON MIX-UP

Is all expelled material simply discarded waste?

No. Soft caecotropes are reingested, unlike hard droppings. The distinction matters because the two materials represent different stages of processing rather than interchangeable examples of the same digestive outcome.[1]

TRY A LITTLE REASONING

Why would a leaf-eater benefit from processing fine particles again?

Reveal the explanation

The first pass does not fully recover the value of difficult plant material. Retention in the caecum and reingestion extend processing, connecting a specialised digestive routine with the challenges posed by a leaf-based diet.[1]

Sources & editorial notes

Adapted and translated from the cited Wikipedia revisions, with source-linked reasoning. Image credit and licence are listed separately above.

Adapted and translated from Wikipedia contributors; exact revisions are linked below. CC BY-SA 4.0

  1. Wikipedia contributors — Common ringtail possum (fixed revision; adapted and translated)
  2. NCBI Taxonomy — Pseudocheirus peregrinus (identity and classification)

Last fact check:

One discovery leads to another

Red kangarooA kangaroo’s bounce stores energy before it releases it.Osphranter rufus ↗Common wombatA wombat’s excavation can become somebody else’s shelter.Vombatus ursinus ↗Sugar gliderSpread the limbs, tension the skin, and the next tree becomes reachable.Petaurus breviceps ↗