Northern Mockingbird

The Northern Mockingbird is a world-famous singer, considered finer even than the Nightingale of Europe (the one John Keats wrote about in his "Ode to a Nightingale"). The male mockingbird sings a medley of songs belonging to other birds, repeating each phrase several times before moving on to the next. Unlike most songbirds, which learn their songs before they're a year old, a mockingbird continues to expand his repertoire all his life. Some include the sounds of people whistling, frogs croaking, and doorbells ringing.

Although all adult male mockingbirds sing during the day, only a bachelor sings at night. He stops doing that as soon as he wins a mate. 

Northern Mockingbird