Cornell Lab of Ornithology via AP
This undated still image taken from video and provided by the Cornell Lab of Ornithology shows an ivory-billed woodpecker. The U.S. government is declaring the ivory-billed woodpecker and 22 more birds, fish and other species extinct.
Hawaii has the most species on the list — eight woodland birds and one plant. That’s in part because the islands have so many plants and animals that many have extremely small ranges and can blink out quickly.