Death's come knocking a last time for the ivory-billed woodpecker and 22 more birds, fish and other species including the tubercled-blossom pearly mussel and the Bachman's warbler. The U.S. government is declaring them extinct. It's a rare move for wildlife officials to give up hope on a plant or animal, but government scientists say they've exhausted efforts to find these 23. They warn climate change, on top of other pressures, could make such disappearances more common as a warming planet adds to the dangers facing imperiled plants and wildlife. Visit www.usatoday.com for more. 📸 @apnews #wildlife #extinct