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  3. Plains Viscacha

One of the 2 viscachas on WAnimals

Mammals · Rodentia · Chinchillidae

Plains Viscacha

Lagostomus maximus

Least Concern

The species is abundant and widely distributed; it faces no significant short-term risk.

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It has one of the most extraordinary breeding strategies known in any mammal: the female releases hundreds of eggs each cycle, of which only a couple ever implant and develop fully.

Weight

3 kg – 9 kg

Size

39.5 cm – 66 cm

Life expectancy

8 years

Diet

Herbivore

Feeds mainly on plants.

Activity

Nocturnal

Active mainly at night.

Social structure

Colony

Lives in large concentrations, often for breeding reasons.

Sighting difficulty

Easy

Grassland
3countries11parks3same family

Fun facts

  • This hyperovulation has no known equivalent in any other mammal.
  • It eats grasses, seeds and roots.
  • It is the largest living member of its family, with marked sexual dimorphism.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (mammal)
Habitat and environment
Pampas grassland and semi-arid country of central Argentina, Bolivia and Paraguay
Birth weight
~200 g at birth, precocial and fully developed
Size at birth
~200 g at birth
Sexual maturity
Female: ~7 months (214 days to a first conception) | Male: 12-16 months
Gestation / incubation
145-154 days (~5 months), after an exceptional hyperovulation of as many as 200-800 eggs
Litter / clutch size
1 to 4 young per litter (most commonly 2)

Sources consulted: Animal Diversity Web; Encyclopedia.com (Viscachas and Chinchillas); Wikipedia (Plains viscacha); Mammalian Species Lagostomus maximus (Oxford Academic); DNA Zoo (Earresistable puzzle)

Where to find it

Best time: All year round on the Argentine pampas, at dusk and at night; by day its 'vizcacheras', the large burrow systems it digs, are very conspicuous.

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The pins mark the parks where its presence is documented.

Where to see it

Parks and dive sites where this species has been documented — showing 10 of 11.

Related species

Other species in the catalogue with the most in common with Plains Viscacha — same habitat, park, country, tags or family.

Same taxonomic family
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Keep exploring

Based on what we already know about plains viscacha.

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See full glossary
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See its range on the interactive map→
TalampayaArgentina
IberáArgentina
El PalmarArgentina
Defensores del ChacoParaguay
CopoArgentina
ChacoArgentina
Sierra de las QuijadasArgentina
Campos del TuyuArgentina
Kaa-Iya del Gran ChacoBolivia
Quebrada del CondoritoArgentina
See all 11 parks
Least Concern

Southern Mountain Viscacha

Lagidium viscacia

Least Concern

Common Yellow-toothed Cavy

Galea musteloides

Least Concern

Southern Naked-tailed Armadillo

Cabassous unicinctus

Southern TamanduaLeast Concern

Southern Tamandua

Tamandua tetradactyla

Least Concern

Pallas's Mastiff Bat

Molossus molossus

Least Concern

Geoffroy's Cat

Leopardus geoffroyi

CountriesArgentina
ParksTalampayaArgentina
TagsHerbivore
Herbivore
Nocturnal
Colonial
Grassland
Mammal
Argentina
Bolivia
Paraguay