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  3. Baiji

One of the 17 dolphins on WAnimals

Mammals · Artiodactyla · Lipotidae

Baiji

Lipotes vexillifer

Critically Endangered

At extremely high risk of imminent extinction in the wild.

Spotted something wrong?

The baiji was a river dolphin endemic to the Yangtze, with a pale body, a long upturned snout and tiny eyes, almost useless in permanently turbid water. It navigated and hunted by echolocation. Industrialisation of the river, dams, river traffic, electrical fishing gear and pollution reduced its population from thousands of animals to a handful in barely fifty years. An international expedition searched for it without success in 2006 and declared it functionally extinct.

Weight

135 kg – 230 kg

Size

2 m – 2.5 m

Life expectancy

24 years

Diet

Carnivore

Feeds mainly on other animals.

Activity

Diurnal

Active mainly during the day.

Sighting difficulty

Very hard

Estimated population

No confirmed sighting since 2002; it is considered functionally extinct

Freshwater
1countries

Fun facts

  • GeneralDeclared probably extinct in 2006: the first cetacean lost to human causes.
  • conservaciónIt was declared functionally extinct in the mid-2000s after an exhaustive expedition failed to find a single animal, and is reckoned one of the first cetaceans lost to human causes.
  • Its lineage had been separate from the rest of the cetaceans for some twenty million years: with it went not just a species but a whole family of mammals.
  • It is the first cetacean human activity has driven to extinction, and it happened without any targeted hunting: transforming its river was enough.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (mammal)
Habitat and environment
The middle and lower reaches of the Yangtze and its connected lakes, in eastern China
Sexual maturity
8 years
Gestation / incubation
10.5 months
Litter / clutch size
1

Sources consulted: https://www.iucnredlist.org/ | https://animaldiversity.org/ | https://es.wikipedia.org/

Where to find it

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Related species

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

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How to help

The baiji is classified as critically endangered. Organisations such as the IUCN, WWF and the Wildlife Conservation Society work specifically on its conservation and that of its habitat; looking into their programmes is a good starting point if you want to get involved.

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Based on what we already know about baiji.

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CountriesChina
TagsCarnivore
Carnivore
Diurnal
Critically Endangered
Freshwater
Mammal
China