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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 ...
The list of extinct cetaceans features the extinct genera and species of the order Cetacea. The cetaceans ( whales , dolphins and porpoises ) are descendants of land-living mammals, the even-toed ungulates .
Unknown; may include climate changes, massive volcanic eruptions and Humans (largely by human overhunting) [4] [5] [6] Neogene: Pliocene–Pleistocene boundary extinction: 2 Ma: Possible causes include a supernova [7] [8] or the Eltanin impact [9] [10] Middle Miocene disruption: 14.5 Ma Climate change due to change of ocean circulation patterns.
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 ...
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Extinction of taxa is difficult to confirm, as a long gap without a sighting is not definitive, but before 1995 a threshold of 50 years without a sighting was used to declare extinction. [ 1 ] One study found that extinction from habitat loss is the hardest to detect, as this might only fragment populations to the point of concealment from humans.
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.