UFO (for solo percussion and orchestra (1999), and for solo percussion and symphonic band (2000)) is a composition written by American composer Michael Daugherty for percussionist Evelyn Glennie.
The world of American popular culture inspires much of Daugherty's music – in the present case, the unidentified flying objects that have been an obsession in American popular culture since 1947 (Scott 2003, 35).