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  3. Coypu
Coypu (Myocastor coypus)

Mammals · Rodentia · Myocastoridae

Coypu

Myocastor coypus

Least Concern

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

Spotted something wrong?

It was introduced to dozens of countries on every continent except Antarctica for the fur trade, and is now one of the most damaging invasive species in the world.

Weight

5 kg – 10 kg

Size

43 cm – 70 cm

Life expectancy

10 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

Freshwater
38countries13parks

AI-generated images: illustrations, not photographs.

Fun facts

  • It can eat up to 25% of its body weight in vegetation a day and do serious damage to dykes and crops.
  • It eats aquatic and emergent plants, roots and stems.
  • It lives in marshes and along the banks of lakes and slow-moving streams across much of South America.
  • ecologíaIt has been introduced to many countries outside its natural range for the fur trade, and in a good number of them has become an invasive species that damages dykes and canals.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (mammal)
Habitat and environment
Marshes and the banks of lakes and slow-moving streams across much of South America, including brackish water
Birth weight
Born fully developed, eyes open and already furred
Size at birth
Born fully developed
Sexual maturity
6 months
Gestation / incubation
127-139 days (~4-4.5 months)
Litter / clutch size
1 to 13 young per litter (average 3-6), with up to 3 litters per year
Life expectancy in captivity
Documented record of up to 19 years

Sources consulted: AnAge (genomics.senescence.info); Animal Diversity Web; Britannica; USGS Species Profile; Texas Invasive Species Institute; Herrera Environmental (invasive species profile); California Species Project

Where to find it

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Where to see it

Parks and dive sites where this species has been documented — showing 10 of 13.

Related species

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

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Keep exploring

Based on what we already know about coypu.

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See full glossary
This page in other languages: Español · Deutsch · Français · Português · Italiano

The pins mark the parks where its presence is documented.

See its range on the interactive map→
Nahuel HuapiArgentina
IberáArgentina
El PalmarArgentina
Esteros de FarraposUruguay
Vicente Perez RosalesChile
ConguillioChile
LaninArgentina
Los AlercesArgentina
Pre-DeltaArgentina
Alerce AndinoChile
See all 13 parks
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White-faced Whistling-Duck

Dendrocygna viduata

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Vampire Bat

Desmodus rotundus

CountriesArgentina
ParksNahuel HuapiArgentina
TagsHerbivore
Herbivore
Nocturnal
Colonial
Freshwater
Mammal

Europe22

South America8

Asia5

North America2

Africa1

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