Twenty-One Species Officially Extinct, While The Ivory-Billed Woodpecker Might Persist
From the loss of the passenger pigeon, perhaps the most lamented extinction case in the United States, to the writing off of the Kaua’i nukupu’u, a Hawaiian forest bird vanished for more than a century and just recently officially declared extinct, the disappearance of species whittles away at the country's biodiversity and attachment to nature.
Source: nationalparkstraveler.org