If You See Any of These Birds, Report Them Immediately

Scientists are on the hunt for over 120 species of birds that may—or may not—be extinct, and they want your help to find them. The ubiquity of smartphones has led to surge in data for birders and researchers alike, in the form of apps that allow amateur bird watchers to photograph and catalog their sightings. The amount of available data is so vast that a group of ornithologists decided to analyze it to see which species just haven’t been turning up. The researchers, who hailed from American Bird Conservancy and...