Close The European bison, the blue whale and, the mountain gorilla are among the species that averted extinction, demonstrating what helps to protect the world's wildlife. Successful conservation stories across the world, here are 10 for now. Gymnogyps californianus (California Condor) The numbers of the biggest North American land bird decreased so rapidly in the 20th century that just 27 were left in 1987, at a certain point all were seized into captivity to strive and rescue the species. Butchart was part of a group of newly measured conservation efforts since 1993 that rescued up to 16 mammals and 32 birds. They are a vulture that feeds on carcasses and ingests scraps of lead shot, because they survived for decades they can over time accumulate. it's extremely poisonous. Other tensions involved chicks consuming filth including glass.