[alistairSH]

From the article: Many of the species were likely extremely endangered or extinct before the Endangered Species Act was passed in 1973, meaning that possibly no amount of conservation would have been able to save them

Most of these wouldn't have been around in any sustainable number well before most of us were born. The real question is whether or not conservation efforts are working on species IDed in the 48 years since. I suspect not, given climate change is bigger than any single species.