The “Cordoba Fighting Dog” was a breed developed in Argentina for dog fighting. As breeders continuously favored the most aggressive dogs, they became difficult to breed since they preferred to fight rather than mate. This contributed to the breed’s extinction.
Two-Thirds of the planet’s wildlife could be extinct by 2020. According to the World Wildlife Fund, our animal population already declined 58% between 1970 and 2012, and we’re on the edge of a new era in which human activity has irreversibly altered the ecosystem. This loss of wildlife would be the largest mass extinction since the dinosaurs.
The whiptail lizard is an all-female species; the males have gone completely extinct. They’re not hermaphroditic. They produce offspring without the aid of male fertilization. The females actually lay eggs, and hatch offspring from unfertilized eggs.
A conservation effort made to save the critically endangered toolache wallaby ended in disaster after 10 of the last surviving members of the species were accidentally killed in the attempt to capture them for a breeding program. They are now extinct.
In 1938, the coelacanth, a prehistoric fish more related to reptiles and mammals than modern fish was discovered. It was thought to have gone extinct 65 years ago, during the same period in which the dinosaurs disappeared.
Extinction was only accepted as a fact in late 18th century after Georges Cuvier, the father of paleontology, disproved the old theory that it was impossible for species to go extinct because God wouldn’t wipe out a species he spent time creating for his Divine Plan.
Australian koalas are in danger of extinction because over half of them have chlamydia. source
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