Last year, bird flu killed more than 40 million egg-laying birds. Including ducks and chickens, 148 million birds have been ordered euthanized since H5N1 began spreading around the U.S. in 2022 ...

No other animal is as inexorably linked with extinction as the dodo, an odd-looking flightless bird that lived on the island of Mauritius in the Indian Ocean until the late 17th century.