Are there nightingales in the US?

Yes, there are nightingales in the U.S., but they are not native species. The most commonly referenced nightingale is the European Nightingale (Luscinia megarhynchos), which is found primarily in Europe, Asia, and parts of North Africa. In the U.S., you might encounter the Eastern Whip-poor-will (Antrostomus vociferus), which is sometimes colloquially referred to as a nightingale due to its song, but it is a different species altogether.