nighthawk

noun5

1. •
   (UK) A nightjar, especially Caprimulgus europaeus (Eurasian nightjar).
2. •
   (US) A New World nightjar of the genus Chordeiles, especially Chordeiles minor.

   • The swallows circled around and I watched them and the night-hawks flying above the roofs and drank the Cinzano. — 1929
3. •
   A person whose preference or custom is to remain awake and active during the night and the early morning hours.
4. •
   A nighthawker (metal detectorist who works illegally at night).
5. •
   (historical) An unlicensed prostitute who worked the roadsides at night.