THE ANIMAL FILES

Guinea pig

Cavia porcellus

The guinea pig’s name hides its South American history.

The domestic guinea pig is a South American rodent shaped by domestication and selective breeding. It is not a miniature pig. Varied coats and the ability to learn routes add to its well-documented history.[1]

Follow the evidence ↓
Guinea pig
Image: User:Laurita · Commons · CC BY 3.0
Animal group
Rodent, in the cavy family[1]
Origin
Domestication in Andean South America[1]
Learning
Can learn and remember routes to food[1]

A domestic animal with wild relatives

Cavia porcellus is not a naturally wild species. Genetic and morphological studies point especially to Cavia tschudii among its likely ancestral relatives. Domestic guinea pigs should therefore be distinguished from the wild cavies with which they are compared. Descriptions of a wild relative’s habitat do not automatically document the life of the domestic species.[1]

Coats changed by selection

People have selected varieties with different colours, lengths and textures of hair. Some breeds have long coats; others have greatly reduced hair.[1]

Remembering a useful path

Guinea pigs can learn complex routes to food and retain a learned route for months. Repeated route choices provide a way to study this spatial memory.[1]

A COMMON MIX-UP

Is a guinea pig a small member of the pig family?

No. It is a rodent in the cavy family, regardless of its common name.[1]

TRY A LITTLE REASONING

Why should a route-learning test repeat the route rather than judge one lucky arrival?

Reveal the explanation

Consistent remembered choices better support learning than a single success, matching the documented ability to retain a route.[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 — Cavia porcellus (adapted and translated; exact revision)
  2. NCBI Taxonomy — Cavia porcellus (identity and game lineage)

Last fact check:

One discovery leads to another

Cape porcupineThe tail can rattle before the quills meet anything.Hystrix africaeaustralis ↗CapybaraWater, grass and dry resting ground all belong in one home range.Hydrochoerus hydrochaeris ↗Naked mole-ratDigging teeth sit outside a closed mouth.Heterocephalus glaber ↗