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The baiji (Lipotes vexillifer), is a probably extinct species of freshwater dolphin native to the Yangtze river system in China. It is thought to be the first dolphin species driven to extinction due to the impact of humans. This dolphin is listed as "critically endangered: possibly extinct" by the IUCN, has not been seen in 20 years, and ...
A species is declared extinct after exhaustive surveys of all potential habitats eliminate all reasonable doubt that the last individual of a species, whether in the wild or in captivity, has died. [15] Recently extinct species are defined by the IUCN as becoming extinct after 1500 CE. [1]
However, the Atlantic population of gray whales (Eschrichtius robustus) became extinct in the 18th century, and the baiji (or Chinese river dolphin, Lipotes vexillifer) was declared "functionally extinct" after an expedition in late 2006 failed to find any in the Yangtze River.
Its closest living relatives are river dolphins living more than 6,000 miles (10,000 kilometers) away in South Asia, according to researchers who recently described the previously unknown extinct ...
Thousands of fish have died recently on Amazon rivers due to a lack of oxygen in the water. ... -The carcasses of 120 river dolphins have been found floating in a tributary of the Amazon River ...
The Bramble Cay melomys, thought to be the first mammal species to go extinct due to the impacts of climate change [61] A 2023 paper concluded that under the high-warming SSP5–8.5 scenario, 50.29% of mammals would lose at least some habitat by 2100 as the conditions become more arid.
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Amazon river dolphins are actually more closely related to oceanic dolphins than to South Asian river dolphins. [14] Isthminia panamensis is an extinct genus and species of river dolphin, living 5.8 to 6.1 million years ago.