This is the Black Robin (Petroica traversi), a species found only in the Chatham Islands, New Zealand:
This was the total world population of Black Robins in 1980:
Five birds. That’s not great—and it gets worse. Guess how many of those were adult females?
Almost any conservationist would tell you that this was a hopeless situation. You can’t restart a species from one female—especially when that female is a whopping eight years old already, in a species that generally lives four years.