All are critically endangered species, balanced precariously on the edge of survival. According to some of Australia's top ecologists, including ALERT member Corey Bradshaw, we might have to let them fall into the abyss.
The hotly debated issue of biological triage was the focus of ABC's Lateline TV show last night. In it, Bradshaw and others argued that, given thin resources and too many endangered species, we may have to give up on some species altogether.
It's not a topic most biologists or conservationists want to think about, but Bradshaw and colleagues say it is time we had the debate.
It's a tough issue. Many endangered species have a coterie of dedicated people who've devoted years of their lives to rescuing them. Such folks don't want to hear that it's all for naught.
Whatever your views, given the rapidly changing state of the world, it's pretty clear this won't be the last time we'll be forced to confront this issue.