CC BY 2.0. That is because the last two living northern white rhinoceros are both females. These birds are believed to have gone extinct for familiar reasons. The video below, created by WWF's Black Rhino Expansion Project, shows the drastic efforts needed to prevent others from going extinct: Simon J. Tonge / Wikimedia Commons / CC BY 3.0. First spotted in a Costa Rican cloud forest in 1964, the golden toad was seen only intermittently since, and the last documented encounter was in 1989. They rely on saltation to move around. The splendid poison frog (Oophaga speciosa) was declared extinct in 2020 and last recorded in 1992. Bob Strauss is a science writer and the author of several books, including "The Big Book of What, How and Why" and "A Field Guide to the Dinosaurs of North America.". It was a very quiet bird, much quieter than other Hawaiian finches, rarely singing or calling. Climate change, habitat loss, and invasive species are contributing to the rapid decline of animal life around the world. & Burbidge, A.A. 2016. The western black rhino, which was the most uncommon of the black rhino subspecies, went extinct in 2011. Another endangered species belonging to the Dendrobatidae family is the golden poison frog, the most poisonous frog in the world. The Oophaga Speciosa popularly known as Splendid Poison Frog went extinct in 2020. Because they were once widely kept as pets, there remains a possibility that living specimens exist in captivity. O. speciosa exhibits uniparental care. Jean-Raphal Guillaumin. They were declared extinct in 2021 though the last official sighting was in 1944 by a person in Louisiana. There were an estimated 150 of these birds in the wild in 1981. Oddly enough, lungless salamanders as a whole are more evolutionarily advanced than their lung-equipped cousins. As with the harlequin toad, some species of the Sri Lanka shrub frog still persist but remain at imminent risk. Isabelle is an undergraduate student at Boston University currently on campus in Boston. [2] Its natural habitats are humid lowland and montane forests. What We've Lost: The Species Declared Extinct in 2020 The Splendid Poison Frog hails from Panama, in a small geographic range found near the western Cordillera de Talamanca Central, adjacent to Costa Rica, at around 1370 m above sea level. Yet, the biggest threat to their existence was human activities. Scientists describe the decline in species on the planet as the 6th mass extinction. The IUCN Red List of Threatened Species. Due to poaching, the species numbers have decreased more than 70% over the last 20 years. All of these species were once native to the island country of Sri Lanka, south of India, and all of them were presumably rendered defunct by a combination of urbanization and disease. Thanks for reading Scientific American. Wildlife Research 44.1 (2017): 9, doi:10.1071/WR16157. 2008). Sadly, the last individual was seen in 2009. What we've lost: the species declared extinct in 2020
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