The concept of a "blue bird of happiness" originated from a play, The Blue Bird, by Maurice Maeterlinck in 1908. Consequently, bluebirds became widely associated as the symbol of happiness and cheer and have been used as such by numerous songwriters. Examples are: Judy Garland's "Hello, Bluebird", "Over the Rainbow" ("Somewhere over the Rainbow/Bluebirds fly"), "I'm Always Chasing Rainbows" ("I'm Always Chasing Rainbows/Waiting to find a little bluebird in vain"), "Zip-A-Dee-Doo-Dah" ("Mr. Bluebird's on my shoulder"), David Bowie's "Lazarus" ("I'll be free / just like that Bluebird"), Vera Lynn's "The White Cliffs of Dover" ("There'll be bluebirds over/The White Cliffs of Dover"; and Paul McCartney and Wings' "Bluebird". Bluebirds are one of the few thrush genera in North America and their beauty alone is uplifting and an inspiration to artists. “Bluebirds in Apple Tree,” is a digital painting and composite.