Green Sea Turtle
Once targets for hunters, as well as the focus of massive conservation efforts, the Sea Turtle now faces extinction due to an all the more inevitable process - rising sea levels.
In the 20th Century, there were less than 100 of these prairie dogs in existence. A concentrated breeding effort managed to re-grow the species in captivity and eventually revitalise the wildlife population, but as people in the US starve, farmland is rated above the Ferret's habitat, and the species is finished off for good.
Once a mainstay of Arctic ecosystems, the Walrus has been driven to the brink of extinction by retreating sea ice and rising temperatures, and hunting has finished the job, leading to a crisis among Arctic food chains. Only time will tell how many other species are lost to history thanks to a reduced stock of prey.
The Arabian Oryx was declared extinct in the 1970's, but a united effort managed to reintroduce the species to the wild from captive populatons. Though an enforcement effort protected the species from poachers, rangers can do nothing to defend the species from the drought and overgrazing that threaten to eradicate the species as a result of climate change.
The Saiga Antelope's horns are prized by Chinese medicine, and erratic weather in the region will drive the species to breaking point.
The Black Rhino can be driven to extinction by rising temperatures baking watering holes and vegetation, compounded by criminal poaching.
Kakapo (Giant Parrot)
The world's only flightless parrot was already at an evolutionary disadvantage, but hunting in pre-GEO times depleted its population critically. Kept alive for decades on two small islands in New Zealand by conservation groups, attacks by wild animals eventually lead to this bird's extinction.