sentences:  This refers to the myth of Philomela in which she turns into a nightingale, and her sister Procne into a swallow.On the other hand, an image of the assembly of swallows for their southward migration concludes John Keats's ode "To Autumn".The swallow is cited in several of William Shakespeare's plays for the swiftness of its flight, with "True hope is swift, and flies with swallow's wings" from Act 5 of "Richard III", and "I have horse will follow where the game Makes way, and run like swallows o'er the plain."