Pelagornis sandersi is an extinct species of pseudotooth bird, whose fossil remains date from 25 million years ago, during the Chattian age of the Oligocene. The sole specimen of P. sandersi has a wingspan estimated between 6.1 and 7.4 m (20 and 24 ft), giving it the largest wingspan of any flying bird yet discovered, twice that of the wandering albatross, which has the largest wingspan of any extant bird (up to 3.7 m (12 ft)).